code: function setSubStepsToSteps (subSteps) {
    const steps = JSON.parse(JSON.stringify(STEPS.language));
    subSteps.forEach(subStep => steps[subStep.parentStep].subSteps.push(subStep));
    return steps;
  }
docs: setSubStepsToSteps
  
  Takes an array of sub-steps and set them to their proper parent step
  
  @param subSteps
  @returns {any}