88dee399_ing_Hibernate___O_Reilly_Media__Purpose
[Method] in [Parameters] String property, Object[] values [Purpose] 
A shortcut for allowing the named property to have any of the values contained in the array. This is more convenient than building up a disjunction⁠⁠(⁠ ⁠) of eq⁠⁠(⁠ ⁠) criteria “by hand.”
The Criteria API: Appendix B - Harnessing Hibernate - O'Reilly Media