1. @DomName('WebGL2RenderingContext.activeTexture')
  2. @DocsEditable()
  3. @Experimental()
void activeTexture(int texture)

Source 

@DomName('WebGL2RenderingContext.activeTexture')
@DocsEditable()
@Experimental() // untriaged
void activeTexture(int texture) => _blink.BlinkWebGL2RenderingContext.instance
    .activeTexture_Callback_1_(this, texture);