code: def __set_no_protein(self, hgvs_string):
          
          no_protein_list = ['0', '0?']  # no protein symbols
          if hgvs_string in no_protein_list:
              self.is_no_protein = True
              self.is_non_silent = True
          else:
              self.is_no_protein = False
docs: Set a flag for no protein expected. ("p.0" or "p.0?")
  
          Args:
              hgvs_string (str): hgvs syntax with "p." removed