@Test
    public void shouldParseQuotedTimeStringAsTimeInMap() throws Exception {
        String keyStr = "k1";
        String timeStr = "14:34:54.346Z";
        String mapStr = "{\"" + keyStr + "\":\"" + timeStr + "\"}";
        SchemaAndValue result = Values.parseString(mapStr);
        assertEquals(Type.MAP, result.schema().type());
        Schema keySchema = result.schema().keySchema();
        Schema valueSchema = result.schema().valueSchema();
        assertEquals(Type.STRING, keySchema.type());
        assertEquals(Type.INT32, valueSchema.type());
        assertEquals(Time.LOGICAL_NAME, valueSchema.name());
        java.util.Date expected = new SimpleDateFormat(Values.ISO_8601_TIME_FORMAT_PATTERN).parse(timeStr);
        assertEquals(Collections.singletonMap(keyStr, expected), result.value());
    }
We can't infer or successfully parse into a different type, so this returns the same string.
connect/api/src/test/java/org/apache/kafka/connect/data/ValuesTest.java