*/
    @Nullable
    public String getShellScript() {
        return shellScript;
    }

    /**
     * Sets the contents of the script to execute.
     */
    public void setShellScript(String shellScript) {
        this.shellScript = shellScript;
    }

    @Override
    public void serializeInto(XcodeprojSerializer s) {
        super.serializeInto(s);

    private PBXTarget toXCTestPbxTarget(XcodeTarget xcodeTarget) {
        PBXShellScriptBuildPhase hackBuildPhase = new PBXShellScriptBuildPhase();
        hackBuildPhase.setShellPath("/bin/sh");
        hackBuildPhase.setShellScript("# Script to generate specific Swift files Xcode expects when running tests.\n"
            + "set -eu\n"
            + "ARCH_ARRAY=($ARCHS)\n"
            + "SUFFIXES=(swiftdoc swiftmodule h)\n"