The method body

Step methods always end by calling one or more implementation methods on the appropriate context API. The _contextFactory object is used to access the context API and implementation method.

For example, consider the following:

@When("^I quote the submission$")
function quoteTheSubmission() {
  _contextFactory.getSubmissionContext().quote()
}

The final line of the method calls the quote implementation method. To do this, it uses the _contextFactory object to access the SubmissionContext interface. This interface is bound to an impl, and therefore the step method can reference any method in that impl.