Function ostree_sys::ostree_commit_metadata_for_bootable

pub unsafe extern "C" fn ostree_commit_metadata_for_bootable(
    root: *mut GFile, 
    dict: *mut GVariantDict, 
    cancellable: *mut GCancellable, 
    error: *mut *mut GError
) -> gboolean

This is supported on crate feature v2021_1 only.