(docs) check if supports function calling

docs/my-website/docs/completion/function_call.md

@@ -1,18 +1,25 @@
 # Function Calling 
-Function calling is supported with the following models on OpenAI, Azure OpenAI
 
-- gpt-4
-- gpt-4-1106-preview
-- gpt-4-0613
-- gpt-3.5-turbo
-- gpt-3.5-turbo-1106
-- gpt-3.5-turbo-0613
-- Non OpenAI LLMs (litellm adds the function call to the prompt for these llms)
+## Checking if a model supports function calling 
 
-In addition, parallel function calls is supported on the following models:
-- gpt-4-1106-preview
-- gpt-3.5-turbo-1106
+Use `litellm.supports_function_calling(model="")` -> returns `True` if model supports Function calling, `False` if not
 
+```python
+assert litellm.supports_function_calling(model="gpt-3.5-turbo") == True
+assert litellm.supports_function_calling(model="azure/gpt-4-1106-preview") == True
+assert litellm.supports_function_calling(model="palm/chat-bison") == False
+assert litellm.supports_function_calling(model="ollama/llama2") == False
+```
+
+
+## Checking if a model supports parallel function calling 
+
+Use `litellm.supports_parallel_function_calling(model="")` -> returns `True` if model supports parallel function calling, `False` if not
+
+```python
+assert litellm.supports_parallel_function_calling(model="gpt-4-turbo-preview") == True
+assert litellm.supports_parallel_function_calling(model="gpt-4") == False
+```
 ## Parallel Function calling
 Parallel function calling is the model's ability to perform multiple function calls together, allowing the effects and results of these function calls to be resolved in parallel