def non_null_value(k, m):
return k in m and not is_null_like(m[k])<EOL>
Determine whether a mapping has a non-null value for a given key.

:param Hashable k: Key to test for non-null value
:param Mapping m: Mapping to test for non-null value for given key
:return bool: Whether given mapping contains given key with non-null value