class_docstr: Wrap an existing proxy.
  
  This is needed as we can't register the same DB mutiple times in
  different positions in a SequentialDB.
class_docstr_tok: ["Wrap","an","existing","proxy",".","This","is","needed","as","we","ca","n't","register","the","same","DB","mutiple","times","in","different","positions","in","a","SequentialDB","."]
code: def query(self, *tags, **kwtags):
      return self.db.query(*tags, **kwtags)
  
imports: from __future__ import absolute_import, print_function, division
  import copy
  import sys
  from theano.compat import DefaultOrderedDict
  from theano.misc.ordered_set import OrderedSet
  from six import StringIO, integer_types
  from theano.gof import opt
  from theano import config
label_desc: Use image node_id 2 for calling the ProxyDB obj's underlying member method code with example usage: obj.query() and returns: self