message: Do not reference webgl types directly.
diff: @@ -10,8 +10,7 @@ import { Angle } from "@bentley/geometry-core/lib/Geometry";
  import { ColorDef } from "@bentley/imodeljs-common/lib/common";
  import { Range2d } from "@bentley/geometry-core/lib/Range";
  import { GraphicBuilder } from "./render/GraphicBuilder";
  -import { Target } from "./render/webgl/Target";
  -// import { Target } from "./render/webgl/Target";
  +import { RenderTarget } from "./render/System";
  /** Describes the geometry of a sheet border. */
  export class SheetBorder {
  @@ -92,6 +91,6 @@ export class SheetBorder {
  builder.activateGraphicParams(params);
  - builder.addShape2d(this.shadow, Target.frustumDepth2d);
  + builder.addShape2d(this.shadow, RenderTarget.frustumDepth2d);
  }
  }
  