1. @DomName('WebGL2RenderingContext.getActiveUniformBlockName')
  2. @DocsEditable()
  3. @Experimental()
String getActiveUniformBlockName(Program program, int uniformBlockIndex)

Source 

@DomName('WebGL2RenderingContext.getActiveUniformBlockName')
@DocsEditable()
@Experimental() // untriaged
String getActiveUniformBlockName(Program program, int uniformBlockIndex) =>
    _blink.BlinkWebGL2RenderingContext.instance
        .getActiveUniformBlockName_Callback_2_(
            this, program, uniformBlockIndex);