How to use the @scion/workbench-application-platform.api.ManifestCommands.FindCapability function in @scion/workbench-application-platform

this.queryManifests(envelope as MessageEnvelope);
        break;
      }
      case ManifestCommands.FindManifest: {
        this.queryManifest(envelope as MessageEnvelope);
        break;
      }
      case ManifestCommands.FindCapabilityProviders: {
        this.queryCapabilityProviders(envelope as MessageEnvelope);
        break;
      }
      case ManifestCommands.FindCapabilityConsumers: {
        this.queryCapabilityConsumers(envelope as MessageEnvelope);
        break;
      }
      case ManifestCommands.FindCapability: {
        this.queryCapability(envelope as MessageEnvelope);
        break;
      }
      case ManifestCommands.FindCapabilities: {
        this.queryCapabilities(envelope as MessageEnvelope);
        break;
      }
      case ManifestCommands.RegisterCapability: {
        this.registerCapability(envelope as MessageEnvelope);
        break;
      }
      case ManifestCommands.UnregisterCapability: {
        this.unregisterCapability(envelope as MessageEnvelope);
        break;
      }
      default: {

public capability$(capabilityId: string): Observable {
    const intentMessage: ManifestRegistryIntentMessages.FindCapability = {
      type: PlatformCapabilityTypes.ManifestRegistry,
      qualifier: NilQualifier,
      payload: {
        command: ManifestCommands.FindCapability,
        capabilityId: capabilityId,
      },
    };

    return Platform.getService(MessageBus).requestReceive$({channel: 'intent', message: intentMessage}, {once: true})
      .pipe(extractMessage(null));
  }