pub fn fold_format_specifier<F, T: AstInfo, T2: AstInfo>(
folder: &mut F,
node: FormatSpecifier<T>,
) -> FormatSpecifier<T2>
pub fn fold_format_specifier<F, T: AstInfo, T2: AstInfo>(
folder: &mut F,
node: FormatSpecifier<T>,
) -> FormatSpecifier<T2>