class_docstr: Methods in this class recursively traverse an AST and
  output source code for the abstract syntax; original formatting
  is disregarged.
docstr: Decrease the indentation level.
docstr_tok: ["Decrease","the","indentation","level","."]
code: def _leave(self):
      "Decrease the indentation level."
      self._indent -= 1
  
imports: import sys
  from compiler.ast import Const, Name, Tuple, Div, Mul, Sub, Add
label_desc: Use image node_id 5 for calling the UnparseCompilerAst obj's underlying member method code with example usage: obj._leave() without return types