OptionaldateOnly present if valueType is dateString. RFC 3339 formatted date: YYYY-MM-DD.
OptionalidThe identifier of this label field.
OptionalintegerOnly present if valueType is integer.
OptionalkindThis is always drive#labelField.
OptionalselectionOnly present if valueType is selection
OptionaltextOnly present if valueType is text.
OptionaluserOnly present if valueType is user.
OptionalvalueThe field type. While new values may be supported in the future, the following are currently allowed: * dateString * integer * selection * text * user
Representation of field, which is a typed key-value pair.