public boolean implies(String namespace, Action action) {
    return namespace.equals(this.namespace) && implies(action);
  }
check if given action is granted in given namespace.
@param namespace namespace's name
@param action    action to be checked
@return true if granted, false otherwise
hbase-client/src/main/java/org/apache/hadoop/hbase/security/access/NamespacePermission.java