text: var mongoose = require('mongoose');
  var Schema = mongoose.Schema;
  
  var contactNumberSchema = new Schema({
      number: { type: Number, required: true },
      contact: [{ type: Schema.Types.ObjectId, ref: 'Contact' }]
  });
  
  var ContactNumber = mongoose.model('ContactNumber', contactNumberSchema);
  
  module.exports = ContactNumber;
  