class Flows::Flow::Router
@abstract
Node
router: defines rules to calculate next {Node} to execute inside a particular {Flow}.
Router
receives {Flows::Result} Object, execution context and execution metadata. Basing on this information a router must decide what to execute next or decide to stop execution of a flow.
If router returns `:end` - it stops an execution process.
@!method call( result )
@abstract @param result [Flows::Result] Result Object, output of a {Node} execution. @return [Symbol] name of the next node or a special symbol `:end`. @raise [NoRouteError] if cannot determine a route.
@!method destinations
@abstract @return [Array<Symbol>] names of all the possible destination nodes