add field maintenance_window.start_time to google_compute_node_group …

…(#4656) (#673)

Signed-off-by: Modular Magician <magic-modules@google.com>

google/compute_node_group.go

@@ -72,6 +72,12 @@ func GetComputeNodeGroupApiObject(d TerraformResourceData, config *Config) (map[
 	} else if v, ok := d.GetOkExists("maintenance_policy"); !isEmptyValue(reflect.ValueOf(maintenancePolicyProp)) && (ok || !reflect.DeepEqual(v, maintenancePolicyProp)) {
 		obj["maintenancePolicy"] = maintenancePolicyProp
 	}
+	maintenanceWindowProp, err := expandComputeNodeGroupMaintenanceWindow(d.Get("maintenance_window"), d, config)
+	if err != nil {
+		return nil, err
+	} else if v, ok := d.GetOkExists("maintenance_window"); !isEmptyValue(reflect.ValueOf(maintenanceWindowProp)) && (ok || !reflect.DeepEqual(v, maintenanceWindowProp)) {
+		obj["maintenanceWindow"] = maintenanceWindowProp
+	}
 	autoscalingPolicyProp, err := expandComputeNodeGroupAutoscalingPolicy(d.Get("autoscaling_policy"), d, config)
 	if err != nil {
 		return nil, err
@@ -112,6 +118,29 @@ func expandComputeNodeGroupMaintenancePolicy(v interface{}, d TerraformResourceD
 	return v, nil
 }
 
+func expandComputeNodeGroupMaintenanceWindow(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
+	l := v.([]interface{})
+	if len(l) == 0 || l[0] == nil {
+		return nil, nil
+	}
+	raw := l[0]
+	original := raw.(map[string]interface{})
+	transformed := make(map[string]interface{})
+
+	transformedStartTime, err := expandComputeNodeGroupMaintenanceWindowStartTime(original["start_time"], d, config)
+	if err != nil {
+		return nil, err
+	} else if val := reflect.ValueOf(transformedStartTime); val.IsValid() && !isEmptyValue(val) {
+		transformed["startTime"] = transformedStartTime
+	}
+
+	return transformed, nil
+}
+
+func expandComputeNodeGroupMaintenanceWindowStartTime(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
+	return v, nil
+}
+
 func expandComputeNodeGroupAutoscalingPolicy(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
 	l := v.([]interface{})
 	if len(l) == 0 || l[0] == nil {