in functions/source/kendra_custom_resource/kendra_custom_resource.py [0:0]
def check_required_properties(dictionary, key):
"""
Check if a key is present in dictionary,
otherwise raise KeyError stating "key is a required property"
:param dictionary: Dictionary
:param key: Key
:return: None or KeyError
"""
if key not in dictionary:
raise KeyError(key + " is a required property")