old_contents: /**
   * @typedef {object} Phaser.Types.Renderer.WebGL.WebGLTextureCompression
   * @since 3.55.0
   *
   * @property {object|undefined} ASTC - Indicates if ASTC compression is supported (mostly iOS).
   * @property {object|undefined} ATC - Indicates if ATC compression is supported.
   * @property {object|undefined} BPTC - Indicates if BPTC compression is supported.
   * @property {object|undefined} ETC - Indicates if ETC compression is supported (mostly Android).
   * @property {object|undefined} ETC1 - Indicates if ETC1 compression is supported (mostly Android).
   * @property {object|undefined} IMG - Indicates the browser supports true color images.
   * @property {object|undefined} PVRTC - Indicates if PVRTC compression is supported (mostly iOS).
   * @property {object|undefined} RGTC - Indicates if RGTC compression is supported (mostly iOS).
   * @property {object|undefined} S3TC - Indicates if S3TC compression is supported on current device (mostly Windows).
   * @property {object|undefined} S3TCRGB - Indicates if S3TCRGB compression is supported on current device (mostly Windows).
   */
  
new_contents: /**
   * @typedef {object} Phaser.Types.Renderer.WebGL.WebGLTextureCompression
   * @since 3.55.0
   *
   * @property {object|undefined} ASTC - Indicates if ASTC compression is supported (mostly iOS).
   * @property {object|undefined} ATC - Indicates if ATC compression is supported.
   * @property {object|undefined} BPTC - Indicates if BPTC compression is supported.
   * @property {object|undefined} ETC - Indicates if ETC compression is supported (mostly Android).
   * @property {object|undefined} ETC1 - Indicates if ETC1 compression is supported (mostly Android).
   * @property {object|undefined} IMG - Indicates the browser supports true color images (all browsers).
   * @property {object|undefined} PVRTC - Indicates if PVRTC compression is supported (mostly iOS).
   * @property {object|undefined} RGTC - Indicates if RGTC compression is supported (mostly iOS).
   * @property {object|undefined} S3TC - Indicates if S3TC compression is supported on current device (mostly Windows).
   * @property {object|undefined} S3TCRGB - Indicates if S3TCRGB compression is supported on current device (mostly Windows).
   */
  
subject: Update WebGLTextureCompression.js