question: used to restrict a value to be null concode_field_sep PlaceHolder placeHolder concode_field_sep Query.SizeGreaterThanEquals sizeGe concode_elem_sep Query.LessThan lt concode_elem_sep Query.LessThanEqualsProperty leProperty concode_elem_sep Query.SizeLessThan sizeLt concode_elem_sep Query.GreaterThanProperty gtProperty concode_elem_sep Query.IdEquals idEq concode_elem_sep Query.Criterion and concode_elem_sep Query.GreaterThanEquals gte concode_elem_sep Query.NotIn notIn concode_elem_sep Query.NotEqualsProperty neProperty concode_elem_sep Query.LessThanProperty ltProperty concode_elem_sep Query.LessThanEquals lte concode_elem_sep Query.Between between concode_elem_sep Query.IsNotNull isNotNull concode_elem_sep Query.Criterion or concode_elem_sep Query.In in concode_elem_sep Query.In in concode_elem_sep Query.Like like concode_elem_sep Query.SizeNotEquals sizeNe concode_elem_sep Query.SizeLessThanEquals sizeLe concode_elem_sep Query.GreaterThanEqualsProperty geProperty concode_elem_sep Query.IsEmpty isEmpty concode_elem_sep Query.Equals eq concode_elem_sep Query.GreaterThan gt concode_elem_sep Query.RLike rlike concode_elem_sep Query.SizeEquals sizeEq concode_elem_sep Query.SizeGreaterThan sizeGt concode_elem_sep Query.NotEquals ne concode_elem_sep Query.EqualsProperty eqProperty concode_elem_sep Query.ILike ilike concode_elem_sep Query.IsNotEmpty isNotEmpty
target: Query . IsNull function ( String arg0 ) { return new Query . IsNull ( arg0 ) ; }