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

"""Load the translation unit from the given source code file by running
        clang and generating the AST before loading. Additional command line
        parameters can be passed to clang via the args parameter.

        In-memory contents for files can be provided by passing a list of pairs
        to as unsaved_files, the first item should be the filenames to be mapped
        and the second should be the contents to be substituted for the
        file. The contents may be passed as strings or file objects.

        If an error was encountered during parsing, a TranslationUnitLoadError
        will be raised.
        """
        return TranslationUnit.from_source(path, args, unsaved_files, options,
                                           self)

class TranslationUnit(ClangObject):
    """Represents a source code translation unit.

    This is one of the main types in the API. Any time you wish to interact
    with Clang's representation of a source file, you typically start with a
    translation unit.
    """

    # Default parsing mode.
    PARSE_NONE = 0

    # Instruct the parser to create a detailed processing record containing
    # metadata not normally retained.
    PARSE_DETAILED_PROCESSING_RECORD = 1

    # Indicates that the translation unit is incomplete. This is typically used
    # when parsing headers.

def __init__(self, ptr, index):
        """Create a TranslationUnit instance.

        TranslationUnits should be created using one of the from_* @classmethod
        functions above. __init__ is only called internally.
        """
        assert isinstance(index, Index)
        self.index = index
        ClangObject.__init__(self, ptr)

return CompletionString(self.completionString)

class CCRStructure(Structure):
    _fields_ = [('results', POINTER(CodeCompletionResult)),
                ('numResults', c_int)]

    def __len__(self):
        return self.numResults

    def __getitem__(self, key):
        if len(self) <= key:
            raise IndexError

        return self.results[key]

class CodeCompletionResults(ClangObject):
    def __init__(self, ptr):
        assert isinstance(ptr, POINTER(CCRStructure)) and ptr
        self.ptr = self._as_parameter_ = ptr

    def from_param(self):
        return self._as_parameter_

    def __del__(self):
        conf.lib.clang_disposeCodeCompleteResults(self)

    @property
    def results(self):
        return self.ptr.contents

    @property
    def diagnostics(self):

return None

    def get_tokens(self, locations=None, extent=None):
        """Obtain tokens in this translation unit.

        This is a generator for Token instances. The caller specifies a range
        of source code to obtain tokens for. The range can be specified as a
        2-tuple of SourceLocation or as a SourceRange. If both are defined,
        behavior is undefined.
        """
        if locations is not None:
            extent = SourceRange(start=locations[0], end=locations[1])

        return TokenGroup.get_tokens(self, extent)

class File(ClangObject):
    """
    The File class represents a particular source file that is part of a
    translation unit.
    """

    @staticmethod
    def from_name(translation_unit, file_name):
        """Retrieve a file handle within the given translation unit."""
        return File(conf.lib.clang_getFile(translation_unit, file_name))

    @property
    def name(self):
        """Return the complete file and path name of the file."""
        return conf.lib.clang_getCString(conf.lib.clang_getFileName(self))

    @property

7: CompletionChunk.Kind("RightParen"),
            8: CompletionChunk.Kind("LeftBracket"),
            9: CompletionChunk.Kind("RightBracket"),
            10: CompletionChunk.Kind("LeftBrace"),
            11: CompletionChunk.Kind("RightBrace"),
            12: CompletionChunk.Kind("LeftAngle"),
            13: CompletionChunk.Kind("RightAngle"),
            14: CompletionChunk.Kind("Comma"),
            15: CompletionChunk.Kind("ResultType"),
            16: CompletionChunk.Kind("Colon"),
            17: CompletionChunk.Kind("SemiColon"),
            18: CompletionChunk.Kind("Equal"),
            19: CompletionChunk.Kind("HorizontalSpace"),
            20: CompletionChunk.Kind("VerticalSpace")}

class CompletionString(ClangObject):
    class Availability:
        def __init__(self, name):
            self.name = name

        def __str__(self):
            return self.name

        def __repr__(self):
            return "" % self

    def __len__(self):
        return self.num_chunks

    @CachedProperty
    def num_chunks(self):
        return conf.lib.clang_getNumCompletionChunks(self.obj)

def __len__(self):
        return int(conf.lib.clang_CompileCommands_getSize(self.ccmds))

    def __getitem__(self, i):
        cc = conf.lib.clang_CompileCommands_getCommand(self.ccmds, i)
        if not cc:
            raise IndexError
        return CompileCommand(cc, self)

    @staticmethod
    def from_result(res, fn, args):
        if not res:
            return None
        return CompileCommands(res)

class CompilationDatabase(ClangObject):
    """
    The CompilationDatabase is a wrapper class around
    clang::tooling::CompilationDatabase

    It enables querying how a specific source file can be built.
    """

    def __del__(self):
        conf.lib.clang_CompilationDatabase_dispose(self)

    @staticmethod
    def from_result(res, fn, args):
        if not res:
            raise CompilationDatabaseError(0,
                                           "CompilationDatabase loading failed")
        return CompilationDatabase(res)

def diagnostics(self):
        class DiagnosticsItr:
            def __init__(self, ccr):
                self.ccr= ccr

            def __len__(self):
                return int(\
                  conf.lib.clang_codeCompleteGetNumDiagnostics(self.ccr))

            def __getitem__(self, key):
                return conf.lib.clang_codeCompleteGetDiagnostic(self.ccr, key)

        return DiagnosticsItr(self)


class Index(ClangObject):
    """
    The Index type provides the primary interface to the Clang CIndex library,
    primarily by providing an interface for reading and parsing translation
    units.
    """

    @staticmethod
    def create(excludeDecls=False):
        """
        Create a new Index.
        Parameters:
        excludeDecls -- Exclude local declarations from translation units.
        """
        return Index(conf.lib.clang_createIndex(excludeDecls, 0))

    def __del__(self):