How to use the @here/harp-materials.EdgeMaterial function in @here/harp-materials

// Read the uniforms from the technique values (and apply the default values).
                    const extrudedPolygonTechnique = technique as ExtrudedPolygonTechnique;

                    const fadingParams = this.getPolygonFadingParams(
                        displayZoomLevel,
                        extrudedPolygonTechnique
                    );

                    // Configure the edge material based on the theme values.
                    const materialParams: EdgeMaterialParameters = {
                        color: fadingParams.color,
                        colorMix: fadingParams.colorMix,
                        fadeNear: fadingParams.lineFadeNear,
                        fadeFar: fadingParams.lineFadeFar
                    };
                    const edgeMaterial = new EdgeMaterial(materialParams);
                    const edgeObj = new THREE.LineSegments(edgeGeometry, edgeMaterial);

                    // Set the correct render order.
                    edgeObj.renderOrder = object.renderOrder + 0.1;

                    FadingFeature.addRenderHelper(
                        edgeObj,
                        viewRanges,
                        fadingParams.lineFadeNear,
                        fadingParams.lineFadeFar,
                        false,
                        extrudedPolygonTechnique.lineColor !== undefined &&
                            Expr.isExpr(extrudedPolygonTechnique.lineColor)
                            ? (renderer, mat) => {
                                  edgeMaterial.color.set(
                                      getPropertyValue(

const fillTechnique = technique as FillTechnique;

                    const fadingParams = this.getPolygonFadingParams(
                        displayZoomLevel,
                        fillTechnique
                    );

                    // Configure the edge material based on the theme values.
                    const materialParams: EdgeMaterialParameters = {
                        color: fadingParams.color,
                        colorMix: fadingParams.colorMix,
                        fadeNear: fadingParams.lineFadeNear,
                        fadeFar: fadingParams.lineFadeFar
                    };
                    const outlineMaterial = new EdgeMaterial(materialParams);
                    const outlineObj = new THREE.LineSegments(outlineGeometry, outlineMaterial);
                    outlineObj.renderOrder = object.renderOrder + 0.1;

                    FadingFeature.addRenderHelper(
                        outlineObj,
                        viewRanges,
                        fadingParams.lineFadeNear,
                        fadingParams.lineFadeFar,
                        false,
                        fillTechnique.lineColor !== undefined &&
                            Expr.isExpr(fillTechnique.lineColor)
                            ? (renderer, mat) => {
                                  const edgeMaterial = mat as EdgeMaterial;
                                  edgeMaterial.color.set(
                                      getPropertyValue(fillTechnique.lineColor!, mapView.zoomLevel)
                                  );