Get a class object from its fully-qualified name or null if the class cannot be found

Property definitions

jvm $ JniEnv :: find_class
	# Get a class object from its fully-qualified name or null if the class cannot be found
	fun find_class(class_name : String): JClass import String.to_cstring `{
		return (*self)->FindClass(self,String_to_cstring(class_name));
	`}
lib/jvm/jvm.nit:216,2--219,3