{"ast_node_type":"function","tokens":[{"end":69,"kind":"keyword","start":0,"text":"fn"}]}
    fn from(CrateRootModuleId { krate }: CrateRootModuleId) -> Self {
impl From<CrateRootModuleId> for ModuleId {
        ModuleId { krate, block: None, local_id: DefMap::ROOT }