default List<TableDescriptor> listTableDescriptors(Pattern pattern) throws IOException {
    return listTableDescriptors(pattern, false);
  }
List all the userspace tables that match the given pattern.
@param pattern The compiled regular expression to match against
@return a list of TableDescriptors
@throws IOException if a remote or network exception occurs
@see #listTableDescriptors()
hbase-client/src/main/java/org/apache/hadoop/hbase/client/Admin.java