add suggested structure to orgchart

README.md

@@ -24,6 +24,18 @@ pinned: false
 - 🔒 Please mind about making the models, spaces and datasets public or private. Metrics can (and have to) be public.
 - 🤐 Do not expose passwords or tokens, use [secrets](https://huggingface.co/docs/hub/spaces-overview#managing-secrets).
 
+<details>
+  <summary>Structure. (Click to expand)</summary>
+
+Your metric should have the following structure:
+- ```_compute(references, predictions)```
+  - Calls a metric engine, defined for example in the ```seametrics``` package, or other
+- ```compute_from_payload(paylaod)```
+  - Call the ```module.compute``` method internally after converting payload -> references, predictions
+- All the metric's parameters, such as iou_threshold, area_ranges, etc.. should be moved to the ```__init__``` method.
+
+</details>
+
 <div align="center">
   <h2> Looking for metrics? </h2>
 </div>