1. @DomName('Range.compareBoundaryPoints')
  2. @DocsEditable()
  3. @Experimental()
int compareBoundaryPoints(int how, Range sourceRange)

Source 

@DomName('Range.compareBoundaryPoints')
@DocsEditable()
@Experimental() // untriaged
int compareBoundaryPoints(int how, Range sourceRange) =>
    _blink.BlinkRange.instance
        .compareBoundaryPoints_Callback_2_(this, how, sourceRange);