code: def is_lambda(fun):
      
      return isinstance(fun, type(LAMBDA)) and fun.__name__ == LAMBDA.__name__
docs: Check whether the given function is a lambda function.
  
      .. testsetup::
  
          from proso.func import is_lambda
  
      .. testcode::
  
          def not_lambda_fun():
              return 1
  
          lambda_fun = lambda: 1
  
          print(
              is_lambda(not_lambda_fun),
              is_lambda(lambda_fun)
          )
      .. testoutput::
  
          False True
  
      Args:
          fun (function)
  
      Returns:
          bool: True if the given function is a lambda function, False otherwise