title: Ignore fields in jackson I/O serialization and also ignore unknown fields
body: <p>As i read in the documentation: </p>
  
  <pre><code>// (i.e. not include in JSON output; or being set even if they were included)
   \@JsonIgnoreProperties({ "internalId", "secretKey" })
   // To ignore any unknown properties in JSON input without exception:
   \@JsonIgnoreProperties(ignoreUnknown=true)
  </code></pre>
  
  <p>but how can I ingore both unknown AND given </p>