# ResponseImageGenCallGeneratingEvent
## Properties
**r#type** | **String** | The type of the event. Always 'response.image_generation_call.generating'. |
**output_index** | **i32** | The index of the output item in the response's output array. |
**item_id** | **String** | The unique identifier of the image generation item being processed. |
**sequence_number** | **i32** | The sequence number of the image generation item being processed. |
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