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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def collision_warning(self, item):
 """ Given a string, print a warning if this could collide with a Zappa core package module. Use for app functions and events. """


        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.")