eclipselink 4.x SessionCustomizer alternative

[techmaddy]

SessionCustomizer is marked for removal in 4.x.
So, I would like to know the alternatives that are made available to achieve this.

[rfelcman]

There is just small refactor/move to package org.eclipse.persistence.sessions see
https://github.com/eclipse-ee4j/eclipselink/blob/4.0/foundation/org.eclipse.persistence.core/src/main/java/org/eclipse/persistence/sessions/SessionCustomizer.java