1. @DomName('WebGL2RenderingContext.isTexture')
  2. @DocsEditable()
  3. @Experimental()
bool isTexture(Texture texture)

Source 

@DomName('WebGL2RenderingContext.isTexture')
@DocsEditable()
@Experimental() // untriaged
bool isTexture(Texture texture) => _blink.BlinkWebGL2RenderingContext.instance
    .isTexture_Callback_1_(this, texture);