FlowElementDescription desc = element.getDescription();
if (desc.getKind() != FlowElementKind.OUTPUT) {
error("{0}は出力を表現していません", desc);
continue;
}
OutputDescription description = (OutputDescription) desc;
ExternalIoDescriptionProcessor proc = environment.getExternals().findProcessor(description);
if (proc == null) {
error("{0}は不明なエクスポーターを利用しています", desc);
continue;
}