Function rustc_ast_lowering::lower_crate

pub fn lower_crate<'a, 'hir>(
    sess: &'a Session, 
    krate: &'a Crate, 
    resolver: &'a mut dyn ResolverAstLowering, 
    nt_to_tokenstream: fn(_: &Nonterminal, _: &ParseSess, _: Span) -> TokenStream, 
    arena: &'hir Arena<'hir>
) -> Crate<'hir>