code: async def linsert(self, name, where, refvalue, value):
          
          return await self.execute_command('LINSERT', name, where, refvalue, value)
docs: Insert ``value`` in list ``name`` either immediately before or after
          [``where``] ``refvalue``
  
          Returns the new length of the list on success or -1 if ``refvalue``
          is not in the list.