void defineClasses(final InMemoryFileManager fileManager)
        {
            fileManager.outputFiles().forEach(file ->
            {
                final byte[] classBytes = file.getClassBytes();
                super.defineClass(null, classBytes, 0, classBytes.length);
            });
        }
Compile the generated sources and return a {@link URLClassLoader} that can be used to load the generated classes.

@return a {@link URLClassLoader} that can be used to load the generated classes
sbe-tool/src/propertyTest/java/uk/co/real_logic/sbe/properties/utils/InMemoryOutputManager.java