schema_obj: add docstring to _is_set()
@@ -491,6 +491,11 @@ class Schema:
@staticmethod
def _is_set(cfg, step=None, index=None):
+ '''Returns whether a user has set a value for this parameter.
+
+ A value counts as set if a user has set a global value OR a value for
+ the provided step/index.
+ '''
node_value_exists = False
if step in cfg['nodevalue']:
if index is None:
