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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 trim_key(self, name, min_version, mount_point=DEFAULT_MOUNT_POINT):
 """Trims older key versions setting a minimum version for the keyring. Once trimmed, previous versions of the key cannot be recovered. Supported methods: POST: /{mount_point}/keys/{name}/trim. Produces: 200 application/json :param name: Specifies the name of the key to be trimmed. :type name: str | unicode :param min_version: The minimum version for the key ring. All versions before this version will be permanently deleted. This value can at most be equal to the lesser of min_decryption_version and min_encryption_version. This is not allowed to be set when either min_encryption_version or min_decryption_version is set to zero. :type min_version: int :param mount_point: The "path" the method/backend was mounted on. :type mount_point: str | unicode :return: The response of the request. :rtype: requests.Response """

        params = {
            'min_available_version': min_version,
        }
        api_path = '/v1/{mount_point}/keys/{name}/trim'.format(
            mount_point=mount_point,
            name=name,
        )
        return self._adapter.post(
            url=api_path,
            json=params,
        )