> RELATIONSHIPS_BY_RELATIONSHIPID

        Handle resource of type relationships_by_relationshipid

OPTIONS (= is mandatory):

- relationshipId
        Identifier of the relationship being queried
        Required with `state=['delete', 'get', 'head']'
        Used by `state=['delete', 'get', 'head']'
        [Default: (null)]
        type: str

- state
        (Choices: delete, get, head)[Default: (null)]
        type: str


REQUIREMENTS:  python >= 3.6
