Function write_batched_instance_buffers 

pub fn write_batched_instance_buffers<GFBD>(
    render_device: Res<'_, RenderDevice>,
    render_queue: Res<'_, RenderQueue>,
    gpu_array_buffer: ResMut<'_, BatchedInstanceBuffers<GFBD::BufferData, GFBD::BufferInputData>>,
    pipeline_cache: Res<'_, PipelineCache>,
    bin_unpacking_buffers: ResMut<'_, BinUnpackingBuffers>,
    sparse_buffer_update_jobs: ResMut<'_, SparseBufferUpdateJobs>,
    sparse_buffer_update_bind_groups: ResMut<'_, SparseBufferUpdateBindGroups>,
    sparse_buffer_update_pipelines: Res<'_, SparseBufferUpdatePipelines>,
)
where
    GFBD: GetFullBatchData,

A system that writes all instance buffers to the GPU.