class_docstr: Concatenation operation of several grammars. You don't initialize this
  yourself, but it's a result of a "Grammar1 + Grammar2" operation.
class_docstr_tok: ["Concatenation","operation","of","several","grammars",".","You","do","n't","initialize","this","yourself",",","but","it","'s","a","result","of","a","``","Grammar1","+","Grammar2","''","operation","."]
code: def __add__(self, other_node):
      return Sequence(self.children + [other_node])
  
imports: from __future__ import unicode_literals
  import re
label_desc: Use image node_id 2 for calling the Sequence obj's underlying member method code with example usage: obj.__add__(other_node) and returns: Sequence