getRule method
Gets a rule of the specified priority.
Request parameters:
project - Project ID for this request.
Value must have pattern
(?:(?:\[-a-z0-9\]{1,63}\.)*(?:\[a-z\](?:\[-a-z0-9\]{0,61}\[a-z0-9\])?):)?(?:\[0-9\]{1,19}|(?:\[a-z0-9\](?:\[-a-z0-9\]{0,61}\[a-z0-9\])?)).
firewallPolicy - Name of the firewall policy to which the queried rule
belongs.
Value must have pattern
\[a-z\](?:\[-a-z0-9\]{0,61}\[a-z0-9\])?|\[1-9\]\[0-9\]{0,19}.
priority - The priority of the rule to get from the firewall policy.
$fields - Selector specifying which fields to include in a partial
response.
Completes with a FirewallPolicyRule.
Completes with a commons.ApiRequestError if the API endpoint returned an error.
If the used http.Client completes with an error when making a REST call,
this method will complete with the same error.
Implementation
async.Future<FirewallPolicyRule> getRule(
  core.String project,
  core.String firewallPolicy, {
  core.int? priority,
  core.String? $fields,
}) async {
  final queryParams_ = <core.String, core.List<core.String>>{
    if (priority != null) 'priority': ['${priority}'],
    if ($fields != null) 'fields': [$fields],
  };
  final url_ =
      'projects/' +
      commons.escapeVariable('$project') +
      '/global/firewallPolicies/' +
      commons.escapeVariable('$firewallPolicy') +
      '/getRule';
  final response_ = await _requester.request(
    url_,
    'GET',
    queryParams: queryParams_,
  );
  return FirewallPolicyRule.fromJson(
    response_ as core.Map<core.String, core.dynamic>,
  );
}