is_lod_feed: true
is_lod_feed: false
is_lod_feed: true
feed_type: 1
feed_type: 0
feed_type: 1

feed_shape {
    shape: -1
}

feed_shape {
    shape: 1
    shape: 2
    shape: 3
}

feed_shape {
    shape: -1
}
