ex-02: delegate airSpeedVelocity to speciesDelegate at AffricanSwallow

Author: kaiosilveira

src/example-02/birds/affrican-swallow/index.js

@@ -7,6 +7,6 @@ export class AffricanSwallow extends Bird {
   }
 
   get airSpeedVelocity() {
-    return 40 - 2 * this._numberOfCoconuts;
+    return this._speciesDelegate.airSpeedVelocity;
   }
 }