How to use the pelican.signals.article_generator_finalized function in pelican

def register():
    signals.article_generator_finalized.connect(_collect_event_info)

def register():
    signals.article_generator_finalized.connect(add_recommended_articles)

def register(): # for Pelican
    signals.article_generator_finalized.connect(populate_metadata)

def register():
    signals.initialized.connect(init_default_config)
    signals.article_generator_finalized.connect(generate_pdf_resume)

def register():
    signals.content_object_init.connect(_handle_content_object_init)
    signals.article_generator_finalized.connect(_inject_aggregates)

def register():
    """Plugin registration."""
    from pelican import signals

    signals.article_generator_finalized.connect(generate_table)

def register():
    """
        Plugin registration
    """
    signals.article_generator_context.connect(add_tags)
    signals.page_generator_context.connect(add_tags)
    signals.article_generator_finalized.connect(move_resources)

def register():
    """
    Plugin registration
    """
    signals.article_generator_context.connect(add_files)
    signals.page_generator_context.connect(add_files)
    signals.article_generator_finalized.connect(move_resources)

def register():
    """Plugin registration."""
    from pelican import signals

    signals.initialized.connect(setup_gist)

    signals.article_generator_finalized.connect(replace_gist_tags)