public function column_headers( $columns ) {
		$columns = array(
			'cb'                => '<input type="checkbox" />',
			'title'             => esc_html__( 'Title',   'bbpress' ),
			'bbp_reply_forum'   => esc_html__( 'Forum',   'bbpress' ),
			'bbp_reply_topic'   => esc_html__( 'Topic',   'bbpress' ),
			'bbp_reply_author'  => esc_html__( 'Author',  'bbpress' ),
			'bbp_reply_created' => esc_html__( 'Created', 'bbpress' ),
		);

		// Filter & return
		return apply_filters( 'bbp_admin_replies_column_headers', $columns );
	}