* 'https': Specifies whether to enable https proxies. Valid options: 'true' and 'false'. Default: 'false'.
+ * 'ensure': Optional parameter. Valid options: 'file', 'present', and 'absent'. Default: 'undef'. Prefer 'file' over 'present'.
+
* `purge`: Specifies whether to purge any existing settings that aren't managed by Puppet. Valid options: a hash made up from the following keys:
* 'sources.list': Specifies whether to purge any unmanaged entries from `sources.list`. Valid options: 'true' and 'false'. Default: 'false'.