private static String getDefaultMessage(boolean upgradable) {
		if (upgradable) {
			return "data created with older software and requires upgrade";
		}
		return "data created with newer version and can not be read";
	}
Constructor.
@param msg detailed message
@param versionIndicator OLDER_VERSION, NEWER_VERSION or UNKNOWN_VERSION
@param upgradable true indicates that an upgrade is possible.
Ghidra/Framework/Project/src/main/java/ghidra/util/exception/VersionException.java