title: How do I add a Jackson mixin to a reader and not to the objectmapper?
body: <p>I have an object that I would like to serialize with an attribute in one part of my program, but without in a different part.  I also have an ObjectMapper which is extensively customized that I use for both serializations.  My first inclination was to use a Mixin to tweak if the attribute is shown, but it seems that you can only put those on the ObjectMapper and not on a reader returned by the ObjectMapper.  Basically the code I would like to be able to write would look like the following.</p>
  
  <pre><code>ObjectMapper myMapper = new ObjectMapper(); // in reality there is a lot of customization
  Foo foo = myMapper.reader().withMixin(Foo.class, FooMixin.class).readValue(jsonParser, Foo.class);
  </code></pre>