ArcGIS Pro 2.7 API Reference Guide
BuildingDisciplineSceneLayer Class
Members 

ArcGIS.Desktop.Mapping Namespace : BuildingDisciplineSceneLayer Class
BuildingDisciplineSceneLayer are sublayers of a BuildingSceneLayer
Object Model
BuildingDisciplineSceneLayer ClassLayer ClassCIMDataConnection ClassCIMBaseLayer ClassSpatialReference ClassMap ClassILayerContainer InterfaceEnvelope Class
Syntax
Remarks
BuildingDisciplineSceneLayers represent each of the individual disciplines (architectural, structural, MEP, etc) that are contained within the building and which were derived from the original BIM data used to create the "parent" BuildingScenelayer
BuildingDisciplineSceneLayers are never created, or exist, stand-alone. They have a composite relationship with the BuildingScenelayer which contains them.
A FilterDefinition is actually applied to the underlying BuildingDisciplineSceneLayers content (within the special "Full Model" BuildingDisciplineSceneLayer)
Inheritance Hierarchy

System.Object
   ArcGIS.Desktop.Framework.Contracts.PropertyChangedBase
      ArcGIS.Desktop.Mapping.MapMember
         ArcGIS.Desktop.Mapping.Layer
            ArcGIS.Desktop.Mapping.CompositeLayer
               ArcGIS.Desktop.Mapping.ServiceLayer
                  ArcGIS.Desktop.Mapping.BuildingDisciplineSceneLayer

Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

BuildingDisciplineSceneLayer Members
ArcGIS.Desktop.Mapping Namespace