title: how to use "navtive_type" in flatbuffers?
body: <p>here is my test schema:</p>
  
  <pre><code>native_include "mystruct.h"
  table testdata
  {
      data:mystruct (native_type);
  }
  </code></pre>
  
  <p>the flatc shows: error: expecting: table instead got: identifier: native_include.</p>
  
  <p>I can't find any detail informations about how to use native_type in the flatbuffers document. </p>
  
  <p>please, can someone show me some examples how to use, and where should i write "namespace flatbuffers { FlatbufferStruct Pack(const native_type&amp; obj); native_type UnPack(const FlatbufferStruct&amp; obj); }"</p>
  
  <p>thanks a lot!</p>