How to ensure that builder pattern is completed?

Question

EDIT: I am not worried about being called in the wrong order since this is enforced through using multiple interfaces, I am just worried about the terminal method getting called

Answer 1

Apply the new permission in a separate step that first validates that the Builder was constructed correctly:

PermissionBuilder builder = permissionManager.grantUser( userId ).permissionTo( Right.READ ).item( docId ).asOf( new Date() );
permissionManager.applyPermission(builder); // validates the PermissionBuilder (ie, was asOf actually called...whatever other business rules)