private @NotNull Set<String> findJavaInstalledByAsdfJava() {
    Path installsDir = findAsdfInstallsDir();
    if (installsDir == null) return Collections.emptySet();
    Path javasDir = installsDir.resolve("java");
    return safeIsDirectory(javasDir) ? scanAll(javasDir, true) : Collections.emptySet();
  }
private @NotNull Set<String> findJavaInstalledByAsdfJava()