# yuiRetainedOwnerFragment

A yui retained owner fragment record carrying ownerId, generation, zOrder, layoutBounds, inkBounds, and related state.

Last updated: 2026-09-09

Package: ui | Status: source-declared

Tags: cpu, method, source-example, thing, ui, yeho

Build YUI's reusable control, layout, interaction, text, accessibility, and retained-rendering models.

```yh
external thing yuiRetainedOwnerFragment
```

- text ownerId: Stores owner id as text.
- int generation: Stores generation as int.
- int zOrder: Stores z order as int.
- yuiRenderBounds layoutBounds: Stores layout bounds as yuiRenderBounds.
- yuiRenderBounds inkBounds: Stores ink bounds as yuiRenderBounds.
- yuiFragmentDependencySignature dependencies: Stores dependencies as yuiFragmentDependencySignature.
- list of yuiDisplayCommand commands: Stores commands as list of yuiDisplayCommand.
- text source: Stores source as text.
- yuiRetainedOwnerFragment(text ownerId, int generation, int zOrder, yuiRenderBounds layoutBounds, yuiRenderBounds inkBounds, yuiFragmentDependencySignature dependencies, text source): Yui retained owner fragment.
- AddCommand(yuiDisplayCommand command) returns bool: Add command.
- ValidationIssue() returns text: Validation issue.
- CommandEquivalent(yuiRetainedOwnerFragment candidate) returns bool: Command equivalent.
- CompositeCompatible(yuiRetainedOwnerFragment candidate) returns bool: Composite compatible.

## Use yuiRetainedOwnerFragment

A complete small caller. Values are illustrative; check the returned result and package requirements before connecting live resources.

Verification: type checked

```yh
using ui

// Build YUI's reusable control, layout, interaction, text, accessibility, and retained-rendering models.
yuiRetainedOwnerFragment sample = yuiRetainedOwnerFragment("owner Id", 1, 1, yuiRenderBounds(1, 1, 1, 1), yuiRenderBounds(1, 1, 1, 1), yuiFragmentDependencySignature("layout Key", "paint Key", "resource Key", "motion Key", "composite Key", "example"), "example")
Console.Log(Text.From(sample.ownerId))

```

Save this beside start.yh as project.mech:

```toml
manifestVersion = "2"
package = "api.example.ui__yuiretainedownerfragment"
version = "0.1.0"
languageEdition = "yeho-core-2026.1"

[app]
kind = "headless"

[[dependencies]]
package = "graphics.image"
version = "0.1.0"
path = "../../../yeho/packages/graphics/image"

[[dependencies]]
package = "graphics.text"
version = "0.1.0"
path = "../../../yeho/packages/graphics/text"

[[dependencies]]
package = "host.ui_services"
version = "0.1.0"
path = "../../../yeho/packages/host/ui_services"

[[dependencies]]
package = "ui"
version = "0.2.0"
path = "../../../yeho/packages/ui"

```

Extract the example archive beside the yeho and dolphin checkouts. This example requires those source dependencies and a current developer compiler.

```sh
./yeho/build/dolphin-metal/yehoc ./api-examples/ui--yuiRetainedOwnerFragment/usage --backend cpu-oracle -o /tmp/yeho-example
/tmp/yeho-example
```


## yuiRetainedOwnerFragment.AddCommand

A complete caller for this public method. Sample inputs are illustrative; native resources require their owning lifecycle.

Verification: type checked

```yh
using ui

// Add command.
yuiRetainedOwnerFragment instance = yuiRetainedOwnerFragment("owner Id", 1, 1, yuiRenderBounds(1, 1, 1, 1), yuiRenderBounds(1, 1, 1, 1), yuiFragmentDependencySignature("layout Key", "paint Key", "resource Key", "motion Key", "composite Key", "example"), "example")
yuiDisplayCommand argument_command = yuiDisplayCommand(1, "owner Id", "kind", "layer Id", "target Id", "resource Id", "paint Id", "clip Id", "transform Id", yuiRenderBounds(1, 1, 1, 1), "semantic Role", "content")
bool result = instance.AddCommand(argument_command)
Console.Log(Text.From(result))

```

Save this beside start.yh as project.mech:

```toml
manifestVersion = "2"
package = "api.example.ui__yuiretainedownerfragment"
version = "0.1.0"
languageEdition = "yeho-core-2026.1"

[app]
kind = "headless"

[[dependencies]]
package = "graphics.image"
version = "0.1.0"
path = "../../../yeho/packages/graphics/image"

[[dependencies]]
package = "graphics.text"
version = "0.1.0"
path = "../../../yeho/packages/graphics/text"

[[dependencies]]
package = "host.ui_services"
version = "0.1.0"
path = "../../../yeho/packages/host/ui_services"

[[dependencies]]
package = "ui"
version = "0.2.0"
path = "../../../yeho/packages/ui"

```

Extract the example archive beside the yeho and dolphin checkouts. This example requires those source dependencies and a current developer compiler.

```sh
./yeho/build/dolphin-metal/yehoc ./api-examples/ui--yuiRetainedOwnerFragment/method-AddCommand-9 --backend cpu-oracle -o /tmp/yeho-example
/tmp/yeho-example
```


## yuiRetainedOwnerFragment.ValidationIssue

A complete caller for this public method. Sample inputs are illustrative; native resources require their owning lifecycle.

Verification: type checked

```yh
using ui

// Validation issue.
yuiRetainedOwnerFragment instance = yuiRetainedOwnerFragment("owner Id", 1, 1, yuiRenderBounds(1, 1, 1, 1), yuiRenderBounds(1, 1, 1, 1), yuiFragmentDependencySignature("layout Key", "paint Key", "resource Key", "motion Key", "composite Key", "example"), "example")
text result = instance.ValidationIssue()
Console.Log(Text.From(result))

```

Save this beside start.yh as project.mech:

```toml
manifestVersion = "2"
package = "api.example.ui__yuiretainedownerfragment"
version = "0.1.0"
languageEdition = "yeho-core-2026.1"

[app]
kind = "headless"

[[dependencies]]
package = "graphics.image"
version = "0.1.0"
path = "../../../yeho/packages/graphics/image"

[[dependencies]]
package = "graphics.text"
version = "0.1.0"
path = "../../../yeho/packages/graphics/text"

[[dependencies]]
package = "host.ui_services"
version = "0.1.0"
path = "../../../yeho/packages/host/ui_services"

[[dependencies]]
package = "ui"
version = "0.2.0"
path = "../../../yeho/packages/ui"

```

Extract the example archive beside the yeho and dolphin checkouts. This example requires those source dependencies and a current developer compiler.

```sh
./yeho/build/dolphin-metal/yehoc ./api-examples/ui--yuiRetainedOwnerFragment/method-ValidationIssue-10 --backend cpu-oracle -o /tmp/yeho-example
/tmp/yeho-example
```


## yuiRetainedOwnerFragment.CommandEquivalent

A complete caller for this public method. Sample inputs are illustrative; native resources require their owning lifecycle.

Verification: type checked

```yh
using ui

// Command equivalent.
yuiRetainedOwnerFragment instance = yuiRetainedOwnerFragment("owner Id", 1, 1, yuiRenderBounds(1, 1, 1, 1), yuiRenderBounds(1, 1, 1, 1), yuiFragmentDependencySignature("layout Key", "paint Key", "resource Key", "motion Key", "composite Key", "example"), "example")
yuiRetainedOwnerFragment argument_candidate = yuiRetainedOwnerFragment("owner Id", 1, 1, yuiRenderBounds(1, 1, 1, 1), yuiRenderBounds(1, 1, 1, 1), yuiFragmentDependencySignature("layout Key", "paint Key", "resource Key", "motion Key", "composite Key", "example"), "example")
bool result = instance.CommandEquivalent(argument_candidate)
Console.Log(Text.From(result))

```

Save this beside start.yh as project.mech:

```toml
manifestVersion = "2"
package = "api.example.ui__yuiretainedownerfragment"
version = "0.1.0"
languageEdition = "yeho-core-2026.1"

[app]
kind = "headless"

[[dependencies]]
package = "graphics.image"
version = "0.1.0"
path = "../../../yeho/packages/graphics/image"

[[dependencies]]
package = "graphics.text"
version = "0.1.0"
path = "../../../yeho/packages/graphics/text"

[[dependencies]]
package = "host.ui_services"
version = "0.1.0"
path = "../../../yeho/packages/host/ui_services"

[[dependencies]]
package = "ui"
version = "0.2.0"
path = "../../../yeho/packages/ui"

```

Extract the example archive beside the yeho and dolphin checkouts. This example requires those source dependencies and a current developer compiler.

```sh
./yeho/build/dolphin-metal/yehoc ./api-examples/ui--yuiRetainedOwnerFragment/method-CommandEquivalent-11 --backend cpu-oracle -o /tmp/yeho-example
/tmp/yeho-example
```


## yuiRetainedOwnerFragment.CompositeCompatible

A complete caller for this public method. Sample inputs are illustrative; native resources require their owning lifecycle.

Verification: type checked

```yh
using ui

// Composite compatible.
yuiRetainedOwnerFragment instance = yuiRetainedOwnerFragment("owner Id", 1, 1, yuiRenderBounds(1, 1, 1, 1), yuiRenderBounds(1, 1, 1, 1), yuiFragmentDependencySignature("layout Key", "paint Key", "resource Key", "motion Key", "composite Key", "example"), "example")
yuiRetainedOwnerFragment argument_candidate = yuiRetainedOwnerFragment("owner Id", 1, 1, yuiRenderBounds(1, 1, 1, 1), yuiRenderBounds(1, 1, 1, 1), yuiFragmentDependencySignature("layout Key", "paint Key", "resource Key", "motion Key", "composite Key", "example"), "example")
bool result = instance.CompositeCompatible(argument_candidate)
Console.Log(Text.From(result))

```

Save this beside start.yh as project.mech:

```toml
manifestVersion = "2"
package = "api.example.ui__yuiretainedownerfragment"
version = "0.1.0"
languageEdition = "yeho-core-2026.1"

[app]
kind = "headless"

[[dependencies]]
package = "graphics.image"
version = "0.1.0"
path = "../../../yeho/packages/graphics/image"

[[dependencies]]
package = "graphics.text"
version = "0.1.0"
path = "../../../yeho/packages/graphics/text"

[[dependencies]]
package = "host.ui_services"
version = "0.1.0"
path = "../../../yeho/packages/host/ui_services"

[[dependencies]]
package = "ui"
version = "0.2.0"
path = "../../../yeho/packages/ui"

```

Extract the example archive beside the yeho and dolphin checkouts. This example requires those source dependencies and a current developer compiler.

```sh
./yeho/build/dolphin-metal/yehoc ./api-examples/ui--yuiRetainedOwnerFragment/method-CompositeCompatible-12 --backend cpu-oracle -o /tmp/yeho-example
/tmp/yeho-example
```


Package presence and a declaration do not establish support on every host. Host services need their platform and lifecycle setup.

Source: yeho/packages/ui/render-50-retained-fragments.yh

AI training permission: https://demonhunterlabs.com/ai-use