class_docstr: Helper class to replace the placeholder once value is collected. 
docstr: Replace the placeholder if it is one or continue. 
docstr_tok: ["Replace","the","placeholder","if","it","is","one","or","continue","."]
code: def visit(self, node):
      """Replace the placeholder if it is one or continue."""
      if isinstance(node, Placeholder):
          return self.placeholders[node.id]
      else:
          return super(PlaceholderReplace, self).visit(node)
  
imports: from pythran.conversion import mangle
  from pythran.analyses import Check, Placeholder, AST_or
  from pythran.passmanager import Transformation
  from copy import deepcopy
  import gast
  from inspect import isclass
label_desc: Use image node_id 2 for calling the PlaceholderReplace obj's underlying member method code with example usage: obj.visit(node) and returns: self, super