anchor.diff:  		  fun eavro_util:std_hook/2 ),
   		Cnt = eavro_ocf_zcodec:read_ocf_with(
   		  F2, 
  -		  fun(Schema, ZInstances) ->
  +		  fun(_Schema, ZInstances) ->
   			  zlists:count(ZInstances)
   		  end),
   		?assert( Cnt > 0 )
  
positive.code: parse_twitter_ocf_test() ->
      Data = eavro:read_ocf("../test/data/twitter.avro"),
      ?assertMatch( 
         {Schema = #avro_record{},
  	_Blocks = 
  	   [_Block = 
  		[ _Rec1 = [<<"miguno">>,<<"Rock: Nerf paper, scissors is fine.">>,
  
negative.code: 		    { Schema, zlists:expand(ZInstances) }
  	    end),
      ?assertMatch( 
         {_Schema = #avro_record{},
  	_Instances = 
  	   [
  	    _Instance = [<<"0000">>, <<"Optimus">>,<<"Prime">> |_] | _ 
  