code: def completions_to_model(cls, payload, config):
      return rename_payload_keys(
          payload,
          {
              "stop": "stopSequences",
              "n": "numResults",
              "max_tokens": "maxTokens",
          },
      )
  
imports: import json
  import time
  from enum import Enum
  import boto3
  import botocore.config
  import botocore.exceptions
  from fastapi import HTTPException
  from fastapi.encoders import jsonable_encoder
  from mlflow.gateway.config import AWSBedrockConfig, AWSIdAndKey, AWSRole, RouteConfig
  from mlflow.gateway.constants import MLFLOW_AI_GATEWAY_ANTHROPIC_DEFAULT_MAX_TOKENS
  from mlflow.gateway.exceptions import AIGatewayConfigException
  from mlflow.gateway.providers.anthropic import AnthropicAdapter
  from mlflow.gateway.providers.base import BaseProvider, ProviderAdapter
  from mlflow.gateway.providers.cohere import CohereAdapter
  from mlflow.gateway.providers.utils import rename_payload_keys
  from mlflow.gateway.schemas import chat, completions, embeddings
label_desc: Use image node_id 1 for calling the AI21Adapter obj's underlying member method code with example usage: obj.completions_to_model(cls, payload, config) and returns: rename_payload_keys