Get associated utility elements

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    // Get the elements associated (by containment) with a specified utility element.
    final utilityAssociations = await _utilityNetwork.getAssociations(
      element: containerElement,
      type: UtilityAssociationType.containment,
    );
    // Iterate all associations for this element.
    for (final association in utilityAssociations) {
      // Get the first ("from") and second ("to") elements in the association.
      final fromElement = association.fromElement;
      final toElement = association.toElement;
    }

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    // Get the current viewpoint's extent.
    final viewpoint =
        _mapViewController.getCurrentViewpoint(ViewpointType.boundingGeometry);

    if (viewpoint == null) return;

    final extent = viewpoint.targetGeometry as Envelope;

    // Create symbols for structural attachment and connectivity associations.
    final attachmentSymbol = SimpleLineSymbol(
      style: SimpleLineSymbolStyle.dot,
      color: Colors.green,
      width: 5,
    );
    final connectivitySymbol = SimpleLineSymbol(
      style: SimpleLineSymbolStyle.dot,
      color: Colors.red,
      width: 5,
    );

    // Create unique value renderer for the associations and apply it to the graphics overlay.
    final attachmentValue = UniqueValue(
      description: 'Attachment',
      symbol: attachmentSymbol,
      values: [UtilityAssociationType.attachment.name],
    );
    final connectivityValue = UniqueValue(
      description: 'Connectivity',
      symbol: connectivitySymbol,
      values: [UtilityAssociationType.connectivity.name],
    );
    _graphicsOverlay.renderer = UniqueValueRenderer(
      fieldNames: ['AssociationType'],
      uniqueValues: [attachmentValue, connectivityValue],
    );

    // Get all of the associations in the current extent.
    try {
      final utilityAssociations =
          await _utilityNetwork.getAssociationsWithEnvelope(extent);

      for (final utilityAssociation in utilityAssociations) {
        // If it's not a containment relationship, add a graphic for the association.
        if (utilityAssociation.associationType !=
            UtilityAssociationType.containment) {
          final graphic = Graphic(
            geometry: utilityAssociation.geometry,
            attributes: {
              'GlobalId': utilityAssociation.globalId,
              'AssociationType': utilityAssociation.associationType.name,
            },
          );
          _graphicsOverlay.graphics.add(graphic);
        }
      }
    } catch (e) {
      // Handle error (show error message, etc.)
      debugPrint('Error getting associations: $e');
    }