private com.google.protobuf.RepeatedFieldBuilderV3<
            com.google.cloud.memorystore.v1.WeeklyMaintenanceWindow,
            com.google.cloud.memorystore.v1.WeeklyMaintenanceWindow.Builder,
            com.google.cloud.memorystore.v1.WeeklyMaintenanceWindowOrBuilder>
        getWeeklyMaintenanceWindowFieldBuilder() {
      if (weeklyMaintenanceWindowBuilder_ == null) {
        weeklyMaintenanceWindowBuilder_ =
            new com.google.protobuf.RepeatedFieldBuilderV3<
                com.google.cloud.memorystore.v1.WeeklyMaintenanceWindow,
                com.google.cloud.memorystore.v1.WeeklyMaintenanceWindow.Builder,
                com.google.cloud.memorystore.v1.WeeklyMaintenanceWindowOrBuilder>(
                weeklyMaintenanceWindow_,
                ((bitField0_ & 0x00000004) != 0),
                getParentForChildren(),
                isClean());
        weeklyMaintenanceWindow_ = null;
      }
      return weeklyMaintenanceWindowBuilder_;
    }
<pre>
Optional. Maintenance window that is applied to resources covered by this
policy. Minimum 1. For the current version, the maximum number of
weekly_window is expected to be one.
</pre>

<code>
repeated .google.cloud.memorystore.v1.WeeklyMaintenanceWindow weekly_maintenance_window = 3 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-valkey/proto-google-cloud-valkey-v1/src/main/java/com/google/cloud/memorystore/v1/MaintenancePolicy.java