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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def write_markdown_to_file(self, f):
 """Prints this library to file `f`. Args: f: File to write to. Returns: Dictionary of documented members. """

    print("---", file=f)
    print("---", file=f)
    print("<!-- This file is machine generated: DO NOT EDIT! -->", file=f)
    print("", file=f)
    # TODO(touts): Do not insert these.  Let the doc writer put them in
    # the module docstring explicitly.
    print("#", self._title, file=f)
    if self._prefix:
      print(self._prefix, file=f)
    print("[TOC]", file=f)
    print("", file=f)
    if self._module is not None:
      self._write_module_markdown_to_file(f, self._module)