Starting and stopping Walk-Thrus can be done by utilizing the following client APIs. Some example usages:

Starting a Walk-Thru with a custom element
Starting a Walk-Thru at an intermediary step when certain conditions are met
Stopping a Walk-Thru when certain conditions are met

WalkMeAPI Functions
`WalkMeAPI.getWalkthrus()`	Returns an array of all published Walk-Thrus.
`WalkMeAPI.startWalkthruById(walkthruId, stepNumber)`	Start a Walk-Thru by its Id with an option to start a specific step.
`WalkMeAPI.stopWalkthru()`	Stop a Walk-Thru.

// Example Walk-Thru Object
{
  CustomField1: null,
  Description: null,
  Id: 124909,
  Index: 6,
  Keywords: [],
  Name: "How to Use the WalkMe API",
  Visible: true
}

// Start a Walk-Thru from the beginning
WalkMeAPI.startWalkthruById(124909);

// Start a Walk-Thru from the 4th step
WalkMeAPI.startWalkthruById(124909, 4);