code: def begin_y(self):
          
          cxnSp = self._element
          y, cy, flipV = cxnSp.y, cxnSp.cy, cxnSp.flipV
          begin_y = y+cy if flipV else y
          return Emu(begin_y)
docs: Return the Y-position of the begin point of this connector, in
          English Metric Units (as a |Length| object).