code: def begin_x(self):
          
          cxnSp = self._element
          x, cx, flipH = cxnSp.x, cxnSp.cx, cxnSp.flipH
          begin_x = x+cx if flipH else x
          return Emu(begin_x)
docs: Return the X-position of the begin point of this connector, in
          English Metric Units (as a |Length| object).