[BUG] `ImageUrl` not exposed on `ResponseContentPart` for `CreateInputImagePart`

[crickman]

Describe the bug

InternalItemContentInputImage.ImageUrl is not exposed as a property on ResponseContentPart

Steps to reproduce

1. Call `ResponseContentPart.CreateInputImagePart(Uri, ResponseImageDetailLevel)
2. Attempt to examine the image uri

Code snippets

ResponseContentPart imagePart = ResponseContentPart.CreateInputImagePart(
            new Uri("https://example.com/image.jpg"),
            ResponseImageDetailLevel.High);

OS

Windows, MacOS, Linux

.NET version

All

Library version

2.8.0

[crickman]

Fix available in #874

[jsquire]

Hi @crickman. Thanks for reaching out, your inquiry, and contribution. I don't know why the URL was originally hidden, but having it public aligns with both the platform docs and REST API spec, so I agree that it should be exposed.

@KrzysztofCwalina, @christothes, @joseharriaga: Would appreciate your thoughts.

References and resources

• OpenAPI v3.1 version (L64,276):

    InputImageContent:
      properties:
        type:
          type: string
          enum:
            - input_image
          description: The type of the input item. Always `input_image`.
          default: input_image
          x-stainless-const: true
        image_url:
          anyOf:
            - type: string
              description: >-
                The URL of the image to be sent to the model. A fully qualified URL or base64 encoded image in
                a data URL.
            - type: 'null'
        file_id:
          anyOf:
            - type: string
              description: The ID of the file to be sent to the model.
            - type: 'null'
        detail:
          $ref: '#/components/schemas/ImageDetail'
          description: >-
            The detail level of the image to be sent to the model. One of `high`, `low`, or `auto`. Defaults
            to `auto`.
      type: object
      required:
        - type
        - detail
      title: Input image
      description: >-
        An image input to the model. Learn about [image
        inputs](https://platform.openai.com/docs/guides/vision).

Generation TypeSpec (L1196):

model ItemContentInputImage extends ItemContent {
  @doc("""
    The type of the input item. Always `input_image`.
    """)
  type: ItemContentType.input_image;

  /** The URL of the image to be sent to the model. A fully qualified URL or base64 encoded image in a data URL. */
  image_url?: string | null;

  /** The ID of the file to be sent to the model. */
  file_id?: string | null;

  // Tool customization: Fix optionality, default of property
  @doc("""
    The detail level of the image to be sent to the model. One of `high`, `low`, or `auto`. Defaults to `auto`.
    """)
  detail?: "low" | "high" | "auto" = "auto";
}