MALFORMED_FILE_REF error condition
FileType value is malformed.
MISSING_PATH_KEY
The dict is missing the required 'path' key.
PATH_NOT_STRING
The 'path' field must be a string, but got <actualType>.
PATH_NULL
The 'path' field must not be null.
WRONG_ARITY
Expected <expected> fields, but got <actual>.
WRONG_TYPE
Expected <expected>, but got <actualType>.