numberComparators: computed(function() {
    return this.createComparators([
      { propertyType: 'number', label: '<>', internalName: 'notEqual', valueForQuery:'{0} != {1}' },
      { propertyType: 'number', label: '<', internalName: 'lessThan', valueForQuery:'{0} < {1}' },
      { propertyType: 'number', label: '<=', internalName: 'lessThanOrEqual', valueForQuery:'{0} <= {1}' },