Java: Expose public class method to all packages of same project but make private for other projects

I have a library project with two packages say package1 and package2 with class1 and class2 respectively. class1 has some public methods exposed to end user. I want to add few utility methods in class1 that only class2 can access. I searched a lot but I couldn't find any access modifier for method to grant access across different packages of same project only.

It there any chance to achieve it by any means?