title: Access the list of valid values for an Enum field in a Mongoose.js Schema
body: <p>The other day I saw a comment on the Web somewhere telling one how to access the list of values defined for an Enum field in a Mongoose.js Schema.  Sadly, I didn't commit that tidbit or its URL to memory and now I need it!</p>
  
  <p>Does anyone know how to do this?</p>
  
  <p>Thanks in advance!</p>