docs: public void set(ValidationSession session, ProxyField proxyField,
              Object value)
      {
          RuleSessionImpl ruleSession = getRuleSession(session);
          RuleProxyField ruleProxyField = ruleSession.getRuleProxyField(proxyField);
          if (ruleProxyField != null)
          {
              ruleSession.setValue(ruleProxyField, value);
          }
      }