docs: public CmsLockFilter getNonBlockingFilter() {
  
          if (m_nonBlockingFilter == null) {
              m_nonBlockingFilter = CmsLockFilter.FILTER_ALL;
              m_nonBlockingFilter = m_nonBlockingFilter.filterLockableByUser(
                  getCms().getRequestContext().getCurrentUser());
              m_nonBlockingFilter = m_nonBlockingFilter.filterSharedExclusive();
          }
          return m_nonBlockingFilter;
      }