1. DomName('WebGL2RenderingContext.checkFramebufferStatus')
  2. DocsEditable()
  3. Experimental()
int checkFramebufferStatus(int target)

Source 

@DomName('WebGL2RenderingContext.checkFramebufferStatus')
@DocsEditable()
@Experimental() // untriaged
int checkFramebufferStatus(int target) => _blink.BlinkWebGL2RenderingContext.instance.checkFramebufferStatus_Callback_1_(this, target);