Here is the source code for com.google.gwt.core.client.GWTBridge.java
Source
package com.google.gwt.core.client;
/**
* This stand-in class allows us to use gwtmockito without bringing in
* gwt-dev as a dependency.
*/publicabstractclass GWTBridge extends com.google.gwt.core.shared.GWTBridge {
}