Вキ
*coldClick="let coldSave of onSave"
теперь
*coldClick="let coldSave of onSave with { context: this}"
лишние буквы
constructor(cd: ChangeDetectorRef) {
this.context = (cd as EmbeddedViewRef<any>).context;
}
whenYouWantToCallOnSave() {
this.onSave.call(this.context);
}