{"ast_node_type":"impl","tokens":[{"end":80,"kind":"keyword","start":0,"text":"impl"}]}
impl FromIterator<(CrateBuilderId, ProcMacroLoadResult)> for ProcMacrosBuilder {
    fn from_iter<T: IntoIterator<Item = (CrateBuilderId, ProcMacroLoadResult)>>(iter: T) -> Self {