Agualar Ts Ejs-diagram in syncfusion

Question

Iam unable to change shape of image to round. enter image description here

border-radius is not working. code.--->

  let image: ImageElement = new ImageElement(); image.margin = { left: 5, right: 8, top: 1, bottom: 1 };
  image.id = obj.id;
  image.width = 70;
  image
  image.height =70;
  image.cornerRadius=50;
  image.style.strokeColor = 'none';

code to change my styles of image to round,.