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# Plugins
MMYOLO supports adding plugins such as `none_local` and `dropblock` after different stages of Backbone. Users can directly manage plugins by modifying the plugins parameter of the backbone in the config. For example, add `GeneralizedAttention` plugins for `YOLOv5`. The configuration files are as follows:
```python
_base_ = './yolov5_s-v61_syncbn_8xb16-300e_coco.py'
model = dict(
backbone=dict(
plugins=[
dict(
cfg=dict(
type='GeneralizedAttention',
spatial_range=-1,
num_heads=8,
attention_type='0011',
kv_stride=2),
stages=(False, False, True, True))
]))
```
`cfg` parameter indicates the specific configuration of the plugin. The `stages` parameter indicates whether to add plug-ins after the corresponding stage of the backbone. The length of the list `stages` must be the same as the number of backbone stages.
MMYOLO currently supports the following plugins:
<details open>
<summary><b>Supported Plugins</b></summary>
1. [CBAM](https://github.com/open-mmlab/mmyolo/blob/dev/mmyolo/models/plugins/cbam.py#L86)
2. [GeneralizedAttention](https://github.com/open-mmlab/mmcv/blob/2.x/mmcv/cnn/bricks/generalized_attention.py#L13)
3. [NonLocal2d](https://github.com/open-mmlab/mmcv/blob/2.x/mmcv/cnn/bricks/non_local.py#L250)
4. [ContextBlock](https://github.com/open-mmlab/mmcv/blob/2.x/mmcv/cnn/bricks/context_block.py#L18)
</details>
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