How to use the pybind11.tools.clang.cindex.SourceLocation function in pybind11

def get_location(self, filename, position):
        """Obtain a SourceLocation for a file in this translation unit.

        The position can be specified by passing:

          - Integer file offset. Initial file offset is 0.
          - 2-tuple of (line number, column number). Initial file position is
            (0, 0)
        """
        f = self.get_file(filename)

        if isinstance(position, int):
            return SourceLocation.from_offset(self, f, position)

        return SourceLocation.from_position(self, f, position[0], position[1])

return conf.lib.clang_getTokenExtent(self._tu, self)

    @property
    def cursor(self):
        """The Cursor this Token corresponds to."""
        cursor = Cursor()

        conf.lib.clang_annotateTokens(self._tu, byref(self), 1, byref(cursor))

        return cursor

# Now comes the plumbing to hook up the C library.

# Register callback types in common container.
callbacks['translation_unit_includes'] = CFUNCTYPE(None, c_object_p,
        POINTER(SourceLocation), c_uint, py_object)
callbacks['cursor_visit'] = CFUNCTYPE(c_int, Cursor, Cursor, py_object)
callbacks['fields_visit'] = CFUNCTYPE(c_int, Cursor, py_object)

# Functions strictly alphabetical order.
functionList = [
  ("clang_annotateTokens",
   [TranslationUnit, POINTER(Token), c_uint, POINTER(Cursor)]),

  ("clang_CompilationDatabase_dispose",
   [c_object_p]),

  ("clang_CompilationDatabase_fromDirectory",
   [c_char_p, POINTER(c_uint)],
   c_object_p,
   CompilationDatabase.from_result),

("clang_getIBOutletCollectionType",
   [Cursor],
   Type,
   Type.from_result),

  ("clang_getIncludedFile",
   [Cursor],
   File,
   File.from_cursor_result),

  ("clang_getInclusions",
   [TranslationUnit, callbacks['translation_unit_includes'], py_object]),

  ("clang_getInstantiationLocation",
   [SourceLocation, POINTER(c_object_p), POINTER(c_uint), POINTER(c_uint),
    POINTER(c_uint)]),

  ("clang_getLocation",
   [TranslationUnit, File, c_uint, c_uint],
   SourceLocation),

  ("clang_getLocationForOffset",
   [TranslationUnit, File, c_uint],
   SourceLocation),

  ("clang_getNullCursor",
   None,
   Cursor),

  ("clang_getNumArgTypes",
   [Type],

def get_location(self, filename, position):
        """Obtain a SourceLocation for a file in this translation unit.

        The position can be specified by passing:

          - Integer file offset. Initial file offset is 0.
          - 2-tuple of (line number, column number). Initial file position is
            (0, 0)
        """
        f = self.get_file(filename)

        if isinstance(position, int):
            return SourceLocation.from_offset(self, f, position)

        return SourceLocation.from_position(self, f, position[0], position[1])

if hasattr(start_location, '__len__'):
            start_location = SourceLocation.from_position(self, f,
                start_location[0], start_location[1])
        elif isinstance(start_location, int):
            start_location = SourceLocation.from_offset(self, f,
                start_location)

        if hasattr(end_location, '__len__'):
            end_location = SourceLocation.from_position(self, f,
                end_location[0], end_location[1])
        elif isinstance(end_location, int):
            end_location = SourceLocation.from_offset(self, f, end_location)

        assert isinstance(start_location, SourceLocation)
        assert isinstance(end_location, SourceLocation)

        return SourceRange.from_locations(start_location, end_location)