code: def findStmtStart(self, block):
          
          prevBlock = self._prevNonCommentBlock(block)
          while prevBlock.isValid() and \
                (((prevBlock == block.previous()) and self._isBlockContinuing(prevBlock)) or \
                 self.isStmtContinuing(prevBlock)):
              block = prevBlock
              prevBlock = self._prevNonCommentBlock(block)
          return block
docs: Return the first line that is not preceded by a "continuing" line.
          Return currBlock if currBlock <= 0