They can always be passed via `-D` on the command line.

Examples of properties that follow the naming rules:

* `org.gradle.internal.operations.trace`
* `org.gradle.internal.cmdline.max.length`
* …

### Properties of pre-incubation features

Properties of pre-incubation features MUST start with `org.gradle.experimental.`  
They can all be called **experimental properties**.

        List<String> cmdList = Arrays.asList("echo", "hello");
        Consumer<ProcessBuilder> pbCall = pb -> {
            pb.redirectErrorStream(true);
        };

        try {
            // Start multiple processes
            processHelper.startProcess(sessionId1, cmdList, pbCall);
            processHelper.startProcess(sessionId2, cmdList, pbCall);

        assertTrue(cmdList.contains("-Dcustom.prop.one=value1"));
        assertTrue(cmdList.contains("-Dcustom.prop.two=value2"));

        // Test with null regex
        cmdList.clear();
        execJob.testAddFessCustomSystemProperties(cmdList, null);
        assertEquals(0, cmdList.size());

        // Test with empty regex
        cmdList.clear();
        execJob.testAddFessCustomSystemProperties(cmdList, "");

        } finally {
            System.clearProperty("os.name");
        }

        List<String> cmdList = mockProcessHelper.getLastCommandList();
        if (cmdList != null && cmdList.size() > 0) {
            assertTrue(cmdList.contains("-cp") || cmdList.contains("-classpath"));
        }
    }

    // Test executeSuggestCreator with Unix environment
    @Test

        public JobProcess startProcess(String sessionId, List<String> cmdList, java.util.function.Consumer<ProcessBuilder> pbConsumer) {
            if (throwException != null) {
                throw throwException;
            }

            startProcessCalled = true;
            capturedSessionId = sessionId;
            capturedCmdList = new ArrayList<>(cmdList);

            ProcessBuilder pb = new ProcessBuilder(cmdList);

        public JobProcess startProcess(String sessionId, List<String> cmdList, java.util.function.Consumer<ProcessBuilder> pbConsumer) {
            if (throwException != null) {
                throw throwException;
            }

            startProcessCalled = true;
            capturedSessionId = sessionId;
            capturedCmdList = new ArrayList<>(cmdList);

            ProcessBuilder pb = new ProcessBuilder(cmdList);

ed","mphantom","mroot","mrow","ms","mspace","msqrt","mstyle","msub","msup","msubsup","mtable","mtd","mtext","mtr","munder","munderover","mprescripts"]),M=i(["maction","maligngroup","malignmark","mlongdiv","mscarries","mscarry","msgroup","mstack","msline","msrow","semantics","annotation","annotation-xml","mprescripts","none"]),U=i(["#text"]),z=i(["accept","action","align","alt","autocapitalize","autocomplete","autopictureinpicture","autoplay","background","bgcolor","border","capture","cellpadding...

				"application/x-berkeley-db",
				"application/x-bibtex-text-file",
				"application/x-bittorrent",
				"application/x-bplist",
				"application/x-bzip",
				"application/x-bzip2",
				"application/x-cdlink",
				"application/x-chat",
				"application/x-chess-pgn",
				"application/x-chrome-package",
				"application/x-compress",
				"application/x-corelpresentations",
				"application/x-cpio",