public void addFile(@Nonnull String className, @Nonnull VirtualJavaFileObject fileObject) {
		unitMap.put(className, fileObject);
	}
Add class to compilation process.

@param className
		Name of class to compile.
@param fileObject
		File object for source code of class.
recaf-core/src/main/java/software/coley/recaf/services/compile/VirtualUnitMap.java