code: function injection(targetObject, varName) {
    let shown = targetObject[varName];
    return `${varName}: Ember.inject.${shown.type}('${shown.name}')`;
  }
docs: Stringify controller/service injection
  Output examples:
  <pre>
  varName: Ember.inject.service('...')
  </pre>
  <pre>
  varName: Ember.inject.controller('...')
  </pre>
  @param {object} targetObject object where variable declared
  @param {string} varName name of needed variable
  @returns {string}