FieldMaskError

Enum describing possible field mask errors.

Enums
UNSPECIFIED	Enum unspecified.
UNKNOWN	The received error code is not known in this version.
FIELD_MASK_MISSING	The field mask must be provided for update operations.
FIELD_MASK_NOT_ALLOWED	The field mask must be empty for create and remove operations.
FIELD_NOT_FOUND	The field mask contained an invalid field.
FIELD_HAS_SUBFIELDS	The field mask updated a field with subfields. Fields with subfields may be cleared, but not updated. To fix this, the field mask should select all the subfields of the invalid field.