diff --git a/services/machinelearningservices/mgmt/2019-05-01/machinelearningservices/machinelearningservicesapi/interfaces.go b/services/machinelearningservices/mgmt/2019-05-01/machinelearningservices/machinelearningservicesapi/interfaces.go
index 1e2cdfbfa484..4512c69f7c38 100644
--- a/services/machinelearningservices/mgmt/2019-05-01/machinelearningservices/machinelearningservicesapi/interfaces.go
+++ b/services/machinelearningservices/mgmt/2019-05-01/machinelearningservices/machinelearningservicesapi/interfaces.go
@@ -46,7 +46,7 @@ var _ WorkspacesClientAPI = (*machinelearningservices.WorkspacesClient)(nil)
 
 // UsagesClientAPI contains the set of methods on the UsagesClient type.
 type UsagesClientAPI interface {
-	List(ctx context.Context, location string) (result machinelearningservices.ListUsagesResultPage, err error)
+	List(ctx context.Context, location string, expandChildren string) (result machinelearningservices.ListUsagesResultPage, err error)
 }
 
 var _ UsagesClientAPI = (*machinelearningservices.UsagesClient)(nil)
diff --git a/services/machinelearningservices/mgmt/2019-05-01/machinelearningservices/usages.go b/services/machinelearningservices/mgmt/2019-05-01/machinelearningservices/usages.go
index 5617427c6421..e1c426c6a935 100644
--- a/services/machinelearningservices/mgmt/2019-05-01/machinelearningservices/usages.go
+++ b/services/machinelearningservices/mgmt/2019-05-01/machinelearningservices/usages.go
@@ -44,7 +44,8 @@ func NewUsagesClientWithBaseURI(baseURI string, subscriptionID string) UsagesCli
 // List gets the current usage information as well as limits for AML resources for given subscription and location.
 // Parameters:
 // location - the location for which resource usage is queried.
-func (client UsagesClient) List(ctx context.Context, location string) (result ListUsagesResultPage, err error) {
+// expandChildren - specifies if detailed usages of child resources are required.
+func (client UsagesClient) List(ctx context.Context, location string, expandChildren string) (result ListUsagesResultPage, err error) {
 	if tracing.IsEnabled() {
 		ctx = tracing.StartSpan(ctx, fqdn+"/UsagesClient.List")
 		defer func() {
@@ -62,7 +63,7 @@ func (client UsagesClient) List(ctx context.Context, location string) (result Li
 	}
 
 	result.fn = client.listNextResults
-	req, err := client.ListPreparer(ctx, location)
+	req, err := client.ListPreparer(ctx, location, expandChildren)
 	if err != nil {
 		err = autorest.NewErrorWithError(err, "machinelearningservices.UsagesClient", "List", nil, "Failure preparing request")
 		return
@@ -84,7 +85,7 @@ func (client UsagesClient) List(ctx context.Context, location string) (result Li
 }
 
 // ListPreparer prepares the List request.
-func (client UsagesClient) ListPreparer(ctx context.Context, location string) (*http.Request, error) {
+func (client UsagesClient) ListPreparer(ctx context.Context, location string, expandChildren string) (*http.Request, error) {
 	pathParameters := map[string]interface{}{
 		"location":       autorest.Encode("path", location),
 		"subscriptionId": autorest.Encode("path", client.SubscriptionID),
@@ -94,6 +95,9 @@ func (client UsagesClient) ListPreparer(ctx context.Context, location string) (*
 	queryParameters := map[string]interface{}{
 		"api-version": APIVersion,
 	}
+	if len(expandChildren) > 0 {
+		queryParameters["expandChildren"] = autorest.Encode("query", expandChildren)
+	}
 
 	preparer := autorest.CreatePreparer(
 		autorest.AsGet(),
@@ -145,7 +149,7 @@ func (client UsagesClient) listNextResults(ctx context.Context, lastResults List
 }
 
 // ListComplete enumerates all values, automatically crossing page boundaries as required.
-func (client UsagesClient) ListComplete(ctx context.Context, location string) (result ListUsagesResultIterator, err error) {
+func (client UsagesClient) ListComplete(ctx context.Context, location string, expandChildren string) (result ListUsagesResultIterator, err error) {
 	if tracing.IsEnabled() {
 		ctx = tracing.StartSpan(ctx, fqdn+"/UsagesClient.List")
 		defer func() {
@@ -156,6 +160,6 @@ func (client UsagesClient) ListComplete(ctx context.Context, location string) (r
 			tracing.EndSpan(ctx, sc, err)
 		}()
 	}
-	result.page, err = client.List(ctx, location)
+	result.page, err = client.List(ctx, location, expandChildren)
 	return
 }