text: export default function (source, target) {
    if (source.y < target.y) {
      return {
        sourceControlX: source.x,
        targetControlX: target.x + (source.anchor === 'right' ? 150 : -150)
      }
    } else {
      return {
        sourceControlX: source.x + (target.anchor === 'right' ? 150 : -150),
        targetControlX: target.x
      }
    }
  }
  