js/libs/ember-data.js
function(record) {
    var type = record.constructor,
        typeMap = this.typeMapFor(type),
        id = get(record, 'id');

    record.updateRecordArrays();

    if (id) {
      delete typeMap.idToRecord[id];
    }

    var loc = indexOf(typeMap.records, record);
    typeMap.records.splice(loc, 1);
  }
function(record) {
    var type = record.constructor,
        typeMap = this.typeMapFor(type),
        id = get(record, 'id');

    record.updateRecordArrays();

    if (id) {
      delete typeMap.idToRecord[id];
    }

    var loc = indexOf(typeMap.records, record);
    typeMap.records.splice(loc, 1);
  }
function ( record ) { var type = record . constructor , typeMap = this . typeMapFor ( type ) , id = get ( record , 'id' ) ; record . updateRecordArrays ( ) ; if ( id ) { delete typeMap . idToRecord [ id ] ; } var loc = indexOf ( typeMap . records , record ) ; typeMap . records . splice ( loc , 1 ) ; }
............... . DESTRUCTION . ............... 
When a record is destroyed, this un-indexes it and
removes it from any record arrays so it can be GCed.

@method dematerializeRecord
@private
@param {DS.Model} record
............... . DESTRUCTION . ............... When a record is destroyed this un - indexes it and removes it from any record arrays so it can be GCed .