pub fn help_msg() -> &'static str {
r#"Usage: rusty-jvm [options] <mainclass> [args...]
Options:
-D<name>=<value> Set a system property
-X<option> JVM options
-XX:<option> Advanced JVM options
--<option> Java launcher options
-<option> Java standard options
-h, --help Show this help message
-V, --version Show version information
"#
}