code: public Class resolveTypeVariable (TypeVariable typeVariable) {
  		for (int i = argumentsSize - 2; i >= 0; i -= 2)
  			if (arguments[i] == typeVariable) return (Class)arguments[i + 1];
  		return null;
  	}
docs: Returns the class for the specified type variable, or null if it is not known.
  @return May be null.