{"ast_node_type":"function","tokens":[{"end":62,"kind":"keyword","start":0,"text":"pub"}]}
    pub fn as_crate_root(&self) -> Option<CrateRootModuleId> {
    /// Returns the [`CrateRootModuleId`] for this module if it is the crate root module.
        if self.local_id == DefMap::ROOT && self.block.is_none() {