code: def get_connection(
      *, connection_id: str, session: Session = NEW_SESSION
  ) -> APIResponse:
      """Get a connection entry."""
      connection = session.scalar(
          select(Connection).where(Connection.conn_id == connection_id)
      )
      if connection is None:
          raise NotFound(
              "Connection not found",
              detail=f"The Connection with connection_id: `{connection_id}` was not found",
          )
      return connection_schema.dump(connection)
  
imports: from __future__ import annotations
  import os
  from http import HTTPStatus
  from typing import TYPE_CHECKING
  from connexion import NoContent
  from flask import Response, request
  from marshmallow import ValidationError
  from sqlalchemy import func, select
  from airflow.api_connexion import security
  from airflow.api_connexion.endpoints.update_mask import extract_update_mask_data
  from airflow.api_connexion.exceptions import AlreadyExists, BadRequest, NotFound
  from airflow.api_connexion.parameters import apply_sorting, check_limit, format_parameters
  from airflow.api_connexion.schemas.connection_schema import ConnectionCollection, connection_collection_schema, connection_schema, connection_test_schema
  from airflow.configuration import conf
  from airflow.models import Connection
  from airflow.secrets.environment_variables import CONN_ENV_PREFIX
  from airflow.security import permissions
  from airflow.utils import helpers
  from airflow.utils.log.action_logger import action_event_from_permission
  from airflow.utils.session import NEW_SESSION, provide_session
  from airflow.utils.strings import get_random_string
  from airflow.www.decorators import action_logging
label_desc: Use image node_id 2 for calling a global function with example usage: get_connection() and returns: connection_schema