public virtual CIMBaseLayer GetDefinition()

await QueuedTask.Run(() =>
   {
     //hide all tools except line tool on a given feature layer
     var editTemplates = featureLayer.GetTemplates();
     var newCIMEditingTemplates = new List<CIMEditingTemplate>();

     foreach (var et in editTemplates)
     {
       //initialize template by activating default tool
       et.ActivateDefaultToolAsync();
       var cimEditTemplate = et.GetDefinition();
       //get the visible tools on this template
       var allTools = et.ToolIDs.ToList();
       //add the hidden tools on this template
       allTools.AddRange(cimEditTemplate.GetExcludedToolIDs().ToList());
       //hide all the tools then allow the line tool

       allTools.AddRange(cimEditTemplate.GetExcludedToolIDs().ToList());

       cimEditTemplate.SetExcludedToolIDs(allTools.ToArray());
       cimEditTemplate.AllowToolID("esri_editing_SketchLineTool");
       newCIMEditingTemplates.Add(cimEditTemplate);
     }
     //update the layer templates
     var layerDef = featureLayer.GetDefinition() as CIMFeatureLayer;
     // Set AutoGenerateFeatureTemplates to false for template changes to stick
     layerDef.AutoGenerateFeatureTemplates = false;
     layerDef.FeatureTemplates = newCIMEditingTemplates.ToArray();
     featureLayer.SetDefinition(layerDef);
   });

{
    // get the CIM definition from the layer
    // Note: needs to be called on the MCT
    var cimFeatureDefinition = featureLayer.GetDefinition() as ArcGIS.Core.CIM.CIMBasicFeatureLayer;
    // get the view of the source table underlying the layer
    var cimDisplayTable = cimFeatureDefinition.FeatureTable;
    // this field is used as the 'label' to represent the row
    var displayField = cimDisplayTable.DisplayField;
}

{
  // Note: call within QueuedTask.Run()
  {
    var def = pointCloudSceneLayer.GetDefinition() as CIMPointCloudLayer;
    //Get the ColorModulation off the renderer
    var modulation = def.Renderer.ColorModulation;
    if (modulation == null)
      modulation = new CIMColorModulationInfo();
    //Set the minimum and maximum intensity as needed
    modulation.MinValue = 0;
    modulation.MaxValue = 100.0;
    //apply back
    def.Renderer.ColorModulation = modulation;
    //Commit changes back to the CIM
    pointCloudSceneLayer.SetDefinition(def);
  }
}

{
  // Note: call within QueuedTask.Run()
  {
    var def = pointCloudSceneLayer.GetDefinition() as CIMPointCloudLayer;

    //Set the point shape and sizing on the renderer
    def.Renderer.PointShape = PointCloudShapeType.DiskShaded;
    var pointSize = new CIMPointCloudFixedSizeAlgorithm()
    {
      UseRealWorldSymbolSizes = false,
      Size = 8
    };
    def.Renderer.PointSizeAlgorithm = pointSize;
    //Commit changes back to the CIM
    pointCloudSceneLayer.SetDefinition(def);
  }
}

{
  // Note: call within QueuedTask.Run()
  {
    var def = pointCloudSceneLayer.GetDefinition() as CIMPointCloudLayer;

    //Set the point shape and sizing on the renderer
    def.Renderer.PointShape = PointCloudShapeType.DiskFlat;//default
    var scaleSize = new CIMPointCloudSplatAlgorithm()
    {
      MinSize = 8,
      ScaleFactor = 1.0 //100%
    };
    def.Renderer.PointSizeAlgorithm = scaleSize;
    //Commit changes back to the CIM
    pointCloudSceneLayer.SetDefinition(def);
  }
}

{
  // Note: call within QueuedTask.Run()
  {
    var def = pointCloudSceneLayer.GetDefinition() as CIMPointCloudLayer;
    //PointsBudget - corresponds to Display Limit on the UI
    // - the absolute maximum # of points to display
    def.PointsBudget = 1000000;

    //PointsPerInch - corresponds to Density Min --- Max on the UI
    // - the max number of points per display inch to renderer
    def.PointsPerInch = 15;
    //Commit changes back to the CIM
    pointCloudSceneLayer.SetDefinition(def);
  }
}