def node(name)
      assoc = associations[name]
      other = assoc.node
      other.eager_load(assoc)
    end
def node(name)
      assoc = associations[name]
      other = assoc.node
      other.eager_load(assoc)
    end
Create a graph node for a given association identifier

 @param [Symbol, Relation::Name] name

 @return [Relation]

 @api public