Implement rotate function for circle geometry

src/ol/geom/Circle.js

@@ -5,6 +5,8 @@ import {createOrUpdate, forEachCorner, intersects} from '../extent.js';
 import GeometryType from './GeometryType.js';
 import SimpleGeometry from './SimpleGeometry.js';
 import {deflateCoordinate} from './flat/deflate.js';
+import {rotate} from './flat/transform.js';
+
 
 /**
  * @classdesc
@@ -212,6 +214,18 @@ class Circle extends SimpleGeometry {
     this.flatCoordinates[this.stride] = this.flatCoordinates[0] + radius;
     this.changed();
   }
+
+  /**
+   * @inheritDoc
+   * @api
+   */
+  rotate(angle, anchor) {
+    const center = this.getCenter();
+    const stride = this.getStride();
+    this.setCenter(rotate(center, 0, center.length, stride, angle, anchor, center));
+    this.changed();
+  }
+
 }