code: def collision_warning(self, item):
          
  
          namespace_collisions = [
              "zappa.", "wsgi.", "middleware.", "handler.", "util.", "letsencrypt.", "cli."
          ]
          for namespace_collision in namespace_collisions:
              if item.startswith(namespace_collision):
                  click.echo(click.style("Warning!", fg="red", bold=True) +
                             " You may have a namespace collision between " +
                             click.style(item, bold=True) +
                             " and " +
                             click.style(namespace_collision, bold=True) +
                             "! You may want to rename that file.")
docs: Given a string, print a warning if this could
          collide with a Zappa core package module.
  
          Use for app functions and events.