code: function(properties, value, equals)
    {
      function discardIt(model)
      {
        model.$discard();
      }
  
      return this.eachWhere( discardIt, properties, value, equals );
    }
docs: Calls {@link Rekord.Model#$discard} on models in this collection that meet
  the given where expression.
  
  @method
  @memberof Rekord.ModelCollection#
  @param {whereInput} [properties] -
  See {@link Rekord.createWhere}
  @param {Any} [value] -
  See {@link Rekord.createWhere}
  @param {equalityCallback} [equals=Rekord.equalsStrict] -
  See {@link Rekord.createWhere}
  @return {Rekord.ModelCollection} -
  The reference to this collection.
  @see Rekord.createWhere
  @see Rekord.Model#$discard