findOrAdd

function

 findOrAdd() 

Option name	Type	Description
idOrObject	String, Object	id or object with .id property
[properties]	Object	Optional properties if id passed as first option
return	Promise

function findOrAdd (idOrObjectOrArray, newObject) {
  return Array.isArray(idOrObjectOrArray)
    ? findOrAddMany.call(this, null, idOrObjectOrArray)
    : findOrAddOne.call(this, null, idOrObjectOrArray, newObject)
}