}

    @Override
    public FieldDesc getFieldDesc(final String fieldName) {
        assertArgumentNotEmpty("fieldName", fieldName);

        final FieldDesc fieldDesc = fieldDescCache.get(fieldName);
        if (fieldDesc == null) {
            throw new FieldNotFoundRuntimeException(beanClass, fieldName);
        }
        return fieldDesc;
    }

    @Override

        final BeanDesc beanDesc = new BeanDescImpl(MyBean.class);
        assertThat(beanDesc.hasFieldDesc("HOGE"), is(true));
        final FieldDesc fieldDesc = beanDesc.getFieldDesc("HOGE");
        assertThat(fieldDesc.getFieldName(), is("HOGE"));
        assertThat(beanDesc.hasFieldDesc("aaa"), is(true));
        assertThat(beanDesc.hasFieldDesc("aaA"), is(not(true)));
    }

    /**