Define a custom parameter type for use in steps.
define the behaviour of this parameter type
ParameterType({ name: 'flight', regexp: /([A-Z]{3})-([A-Z]{3})/, transformer: (t, from, to) => new Flight(from, to)}) Copy
ParameterType({ name: 'flight', regexp: /([A-Z]{3})-([A-Z]{3})/, transformer: (t, from, to) => new Flight(from, to)})
Define a custom parameter type for use in steps.