1. DomName('WebGL2RenderingContext.isVertexArray')
  2. DocsEditable()
  3. Experimental()
bool isVertexArray(VertexArrayObject vertexArray)

Source 

@DomName('WebGL2RenderingContext.isVertexArray')
@DocsEditable()
@Experimental() // untriaged
bool isVertexArray(VertexArrayObject vertexArray) => _blink.BlinkWebGL2RenderingContext.instance.isVertexArray_Callback_1_(this, vertexArray);