1. @DomName('WebGL2RenderingContext.isSampler')
  2. @DocsEditable()
  3. @Experimental()
bool isSampler(Sampler sampler)

Source 

@DomName('WebGL2RenderingContext.isSampler')
@DocsEditable()
@Experimental() // untriaged
bool isSampler(Sampler sampler) => _blink.BlinkWebGL2RenderingContext.instance
    .isSampler_Callback_1_(this, sampler);