add_action( 'genesis_after_header', 'function_to_add' );
function function_to_add() {

	if ( function_exists( 'soliloquy' ) ) { // if Soliloquy is active
		$front_page_header_slider = get_page_by_path( 'front-page-header', OBJECT, 'soliloquy' );
		var_dump( $front_page_header_slider );
	}

}