title: Jackson JsonMappingException: Unrecognized column 'C': known columns {"A","B"}
body: <p>how do i create partial representation from myBean </p>
  
  <p>class MyBean{
  A,
  B,
  C
  }</p>
  
  <p>i would like to create csv only for A,B properties</p>
  
  <p>using the following code throw the exception bellow</p>
  
  <pre><code>CsvSchema schema = CsvSchema.builder().
                      .addColumn("A")
                      .addColumn("B")
                      .build();
  </code></pre>
  
  <p>CsvMapper mapper = new CsvMapper();
  ObjectWriter writer = mapper.writer(schema);                        </p>
  
  <p>byte[] csv  = writer.writeValueAsBytes(bean);</p>
  
  <p>getting the exception :</p>
  
  <p><strong>JsonMappingException: Unrecognized column 'C': known columns {"A","B"}</strong></p>
  
  <p>i'm using jackson 2.7.3</p>
  
  <p>Thanks </p>