@Override
  public String toString() {
    return "[id=" + id + ", isNew=" + isNew + ", isValid="
        + isValid + ", hasDelta=" + hasDelta() + ", lastAccessedTime="
        + attributes.getLastAccessedTime() + ", jvmOwnerId="
        + attributes.getJvmOwnerId()
        + "]";
  }
These three methods handle delta propagation and are deferred to the attribute object.
extensions/geode-modules-session-internal/src/main/java/org/apache/geode/modules/session/internal/filter/GemfireHttpSession.java