Function swc_core::ecma::visit::as_folder

pub fn as_folder<V>(v: V) -> Folder<V>
where
    V: VisitMut,

Available on crate features __ecma and __visit only.

The returned folder only handles fold_script and fold_module, and typescript nodes are ignored. So if your visitor needs to handle typescript or low-level nodes, you should use as_folder instead.