def children( parent )
      ary = []
      parent = to_key(parent)

      @h.each_pair do |child,logger|
        next if :root == child
        ary << logger if parent == parent_name(child)
      end
      return ary.sort
    end
def children( parent )
      ary = []
      parent = to_key(parent)

      @h.each_pair do |child,logger|
        next if :root == child
        ary << logger if parent == parent_name(child)
      end
      return ary.sort
    end
call-seq:
    children( key )

 Returns an array of the children loggers for the logger identified by
 _key_ where _key_ follows the same identification rules described in
 +Repository#[]+. Children are returned regardless of the
 existence of the logger referenced by _key_.