ScalarFieldTypeUtil { @Nonnull public static String getWrapperType(ScalarFieldType type) { return getNonNull(WRAPPER_TYPE, type); } private  ScalarFieldTypeUtil(); @Nonnull static String getWrapperType(ScalarFieldType type); @Nonnull static String getPrimitiveType(ScalarFieldType type); @Nonnull static String getDefaultValue(ScalarFieldType type);  }
@Test void getWrapperType() { assertEquals("Integer", ScalarFieldTypeUtil.getWrapperType(INT32)); }
@Test void getWrapperType_null_input() { Assertions.assertThrows(IllegalArgumentException.class, () -> ScalarFieldTypeUtil.getWrapperType(null)); }