describePatchGroups method
      
Future<DescribePatchGroupsResult> 
describePatchGroups({ 
    
- List<
PatchOrchestratorFilter> ? filters, - int? maxResults,
 - String? nextToken,
 
Lists all patch groups that have been registered with patch baselines.
May throw InternalServerError.
Parameter filters :
One or more filters. Use a filter to return a more specific list of
results.
For DescribePatchGroups,valid filter keys include the
following:
- 
NAME_PREFIX: The name of the patch group. Wildcards (*) are accepted. - 
OPERATING_SYSTEM: The supported operating system type to return results for. For valid operating system values, see GetDefaultPatchBaselineRequest$OperatingSystem in CreatePatchBaseline.Examples:
- 
--filters Key=NAME_PREFIX,Values=MyPatchGroup* - 
--filters Key=OPERATING_SYSTEM,Values=AMAZON_LINUX_2 
 - 
 
Parameter maxResults :
The maximum number of patch groups to return (per page).
Parameter nextToken :
The token for the next set of items to return. (You received this token
from a previous call.)
Implementation
Future<DescribePatchGroupsResult> describePatchGroups({
  List<PatchOrchestratorFilter>? filters,
  int? maxResults,
  String? nextToken,
}) async {
  _s.validateNumRange(
    'maxResults',
    maxResults,
    1,
    100,
  );
  final headers = <String, String>{
    'Content-Type': 'application/x-amz-json-1.1',
    'X-Amz-Target': 'AmazonSSM.DescribePatchGroups'
  };
  final jsonResponse = await _protocol.send(
    method: 'POST',
    requestUri: '/',
    exceptionFnMap: _exceptionFns,
    // TODO queryParams
    headers: headers,
    payload: {
      if (filters != null) 'Filters': filters,
      if (maxResults != null) 'MaxResults': maxResults,
      if (nextToken != null) 'NextToken': nextToken,
    },
  );
  return DescribePatchGroupsResult.fromJson(jsonResponse.body);
}