code: @Override
      public boolean deletePolicy(String name) throws PolicyIndexException {
  
          writeLock.lock();
          try {
              logger.debug("Deleting policy named: " + name);
              return doDelete(name);
          } finally {
              writeLock.unlock();
          }
      }
docs: /*
  (non-Javadoc)
  @see
  org.fcrepo.server.security.xacml.pdp.data.PolicyDataManager#deletePolicy(java.lang.String)