Dynamic state transition from sibling states in a SproutCore state chart

gistfile1.js

 gotoStateFromFirstSiblingCurrentState: function(destinationState, commonParentState, defaultSourceState) {
    var sourceState = this.get('currentStates').find(function(s) {
      var isSibling = s.getPath('parentState.stateName') === commonParentState;
      return isSibling;
    });

    sourceState = sourceState || defaultSourceState;
    this.gotoState(destinationState, sourceState);
  }