class_docstr: Methods in this class recursively traverse an AST and
  output source code for the abstract syntax; original formatting
  is disregarged.
docstr: Function call.
          
docstr_tok: ["Function","call","."]
code: def _CallFunc(self, t):
      """Function call."""
      self._dispatch(t.node)
      self._write("(")
      comma = False
      for e in t.args:
          if comma:
              self._write(", ")
          else:
              comma = True
          self._dispatch(e)
      if t.star_args:
          if comma:
              self._write(", ")
          else:
              comma = True
          self._write("*")
          self._dispatch(t.star_args)
      if t.dstar_args:
          if comma:
              self._write(", ")
          else:
              comma = True
          self._write("**")
          self._dispatch(t.dstar_args)
      self._write(")")
  
imports: import sys
  from compiler.ast import Const, Name, Tuple, Div, Mul, Sub, Add
label_desc: Use image node_id 16 for calling the UnparseCompilerAst obj's underlying member method code with example usage: obj._CallFunc(t) without return types