test/org/apache/pig/builtin/avro/data/json/recordsWithDoubleUnderscores.json

{
 "A__key" : {"string" : "A"},
 "B__C__intValue" : {"int" : 1}
}
{
 "A__key" : {"string" : "B"},
 "B__C__intValue" : {"int" : 2}
}
{
 "A__key" : {"string" : "C"},
 "B__C__intValue" : {"int" : 3}
}