qbit/core/src/main/java/io/advantageous/qbit/reactive/CallbackBuilder.java
public <T> CallbackBuilder delegate(final Callback<T> callback) {

        this.withErrorHandler(callback::onError);

        this.withTimeoutHandler(callback::onTimeout);

        return this;
    }
public <T> CallbackBuilder delegate(final Callback<T> callback) {

        this.withErrorHandler(callback::onError);

        this.withTimeoutHandler(callback::onTimeout);

        return this;
    }
Builder method to delegate timeout and error handling to other callback.

@param callback callback
@param <T>      T
@return this