pub fn parsed_to_ast(
handler: &Handler,
engines: &Engines,
parse_program: &mut ParseProgram,
initial_namespace: &mut Root,
build_config: Option<&BuildConfig>,
package_name: &str,
retrigger_compilation: Option<Arc<AtomicBool>>,
experimental: ExperimentalFeatures,
) -> Result<TyProgram, ErrorEmitted>