Add abstract translate to ol/geom/Geometry

src/ol/geom/Geometry.js

@@ -152,6 +152,15 @@ class Geometry extends BaseObject {
    */
   scale(sx, opt_sy, opt_anchor) {}
 
+  /**
+   * Translate the geometry. This modifies the geometry coordinates in place.
+   * @abstract
+   * @param {number} deltaX Delta X.
+   * @param {number} deltaY Delta Y.
+   * @api
+   */
+  translate(deltaX, deltaY) {}
+
   /**
    * Create a simplified version of this geometry.  For linestrings, this uses
    * the the {@link