Argument names missing in method declaration when using code assist to implement missing methods

package test;

public interface I
{
	void myMethod(String a, int b);
}

package test

class A implements I {
  |	
}

package test

class A implements I {
	void myMethod(String arg0, int arg1) {
		// TODO Groovy Auto-generated method stub
		// Only partially implemented. Perform organize imports
		// to properly import parameter and return types
	}
}

package test

class A implements I {
	void myMethod(String a, int b) {
		// TODO Groovy Auto-generated method stub
		// Only partially implemented. Perform organize imports
		// to properly import parameter and return types
	}
}