
export default abstract class VertexAddEvent {
  /**
   * Set to true when `preventDefault()` is called.
   *
   * @default false
   */
  defaultPrevented: boolean;
  /** The type of the event. */
  readonly type: "vertex-add";
  /** Index of the vertex where the event was applied. */
  vertexIndex: number;
  /**
   * Two-dimensional array of numbers representing the coordinates of each vertex
   * that make the geometry.
   */
  vertices: number[][];
  /** Prevents event propagation bubbling up the event chain. */
  preventDefault(): void;
}