assertArgumentNotNull("method", method);

        final Type[] parameterTypes = method.getGenericParameterTypes();
        return GenericsUtil.getRawClass(GenericsUtil.getElementTypeOfCollection(parameterTypes[position]));
    }

    /**
     * Returns the element type of the parameterized collection declared as the method's return type.
     *
     * @param method

     * @return the element type of the collection
     */
    public static Class<?> getElementTypeOfCollection(final Field field) {
        assertArgumentNotNull("field", field);

        final Type type = field.getGenericType();
        return GenericsUtil.getRawClass(GenericsUtil.getElementTypeOfCollection(type));
    }

    /**
     * Returns the key type of a parameterized map field.
     *

     * </p>
     *
     * @param type
     *            the type to analyze
     * @return the element type of the collection, or null if not a parameterized collection
     */
    public static Type getElementTypeOfCollection(final Type type) {
        if (!isTypeOf(type, Collection.class)) {
            return null;
        }
        return getGenericParameter(type, 0);
    }

    /**