value {
          list {
          }
        }
      }
      attr {
        key: "config_proto"
        value {
          s: "\202\001\0008\0012\002J\000\n\007\n\003CPU\020\001\n\007\n\003GPU\020\000"
        }
      }
      attr {
        key: "f"
        value {
          func {
            name: "__inference_signature_wrapper_13"
          }
        }
      }
    }

  indices = [0, 2, -1, 1]
  depth = 3
  on_value = 5.0
  off_value = 0.0
  axis = -1
```

Then output is `[4 x 3]`:
```
output =
  [5.0 0.0 0.0]  // one_hot(0)
  [0.0 0.0 5.0]  // one_hot(2)
  [0.0 0.0 0.0]  // one_hot(-1)
  [0.0 5.0 0.0]  // one_hot(1)
```

Suppose that
```
  indices = [0, 2, -1, 1]
  depth = 3
  on_value = 0.0
  off_value = 3.0