code: def name(self):
          
  
          if self._name is not None:
              return self._name
  
          if not self.blocks:
              return None
  
          if not self.blocks[0].instructions:
              return None
  
          if not self.blocks[0].instructions[0].labels:
              return None
  
          lbl = self.blocks[0].instructions[0].labels[0]
  
          if isinstance(lbl, FunctionLabel):
              return lbl.function_name
  
          return None
docs: Get function name from the labels of the very first block.
          :return: Function name if there is any, None otherwise
          :rtype: string