everymodule#step method implementation

everymoduleStep.js

step: function (name) {
      var steps = this._steps
        , sequence = this._currSeq;

      if (!sequence)
        throw new Error("You can only declare a step after declaring a route alias via `get(...)` or `post(...)`.");

      sequence.orderedStepNames.push(name);

      this._currentStep =
        steps[name] || (steps[name] = new Step(name, this));

      // For configuring what the actual business
      // logic is:
      // fb.step('fetchOAuthUser') generates the method
      // fb.fetchOAuthUser whose logic can be configured like
      // fb.fetchOAuthUser( function (...) {
      //   // Business logic goes here
      // } );
      this.configurable(name, 
        'STEP FN [' + name + '] function encapsulating the logic for the step `' + name + '`.');
      return this;
    }