java.lang.IllegalArgumentException: object is not an instance of declaring class	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at com.assertthat.selenium_shutterbug.utils.web.Browser.defineCustomCommand(Browser.java:918)	at com.assertthat.selenium_shutterbug.utils.web.Browser.takeFullPageScreenshotChromeCommand(Browser.java:713)	at com.assertthat.selenium_shutterbug.utils.web.Browser.takeFullPageScreenshot(Browser.java:155)	at com.assertthat.selenium_shutterbug.core.Shutterbug.shootPage(Shutterbug.java:154)	at com.assertthat.selenium_shutterbug.core.Shutterbug.shootPage(Shutterbug.java:83)	at com.assertthat.selenium_shutterbug.core.Shutterbug.shootPage(Shutterbug.java:69)