public <T> CallbackBuilder setCallback(final Class<T> returnType, final Callback<T> callback) {
    """
	Builder method to add a callback handler.
	
	@param returnType returnType
	@param callback   callback
	@param <T>        T
	@return this
    """
        return withCallback(returnType, callback);
    }
public <T> CallbackBuilder setCallback(final Class<T> returnType, final Callback<T> callback) {
        return withCallback(returnType, callback);
    }
public < T > CallbackBuilder setCallback ( final Class < T > returnType , final Callback < T > callback ) { return withCallback ( returnType , callback ) ; }
Builder method to add a callback handler.

@param returnType returnType
@param callback   callback
@param <T>        T
@return this
Builder method to add a callback handler .