addon/components/detail.js
function addMetaProperty (object, propName, value) {
  defineProperty(object, propName, {
    enumerable: false,
    value
  })
}
function addMetaProperty (object, propName, value) {
  defineProperty(object, propName, {
    enumerable: false,
    value
  })
}
function addMetaProperty ( object , propName , value ) { defineProperty ( object , propName , { enumerable : false , value } ) }
Adds an unenumerable property to an object
@param {Object} object - object to add property to
@param {String} propName - property name
@param {Object|Number|String} value - property value
Adds an unenumerable property to an object