Tracks the available next actions for a resource, and issues requests for them.
Adds a Relation to the map.
rel - A Relation.
Returns nothing.
Gets the raw Relation by its name.
key - The Symbol name of the Relation.
Returns a Relation.
Gets a list of the Relation names.
Returns an Array of Symbols in no specific order.
Gets the number of mapped Relations.
Returns an Integer.
Alias for to_hash
[Validate]