google/dart-sync-webdriver — pull request #27 by goderbauer (2014-10-09 00:37:41+00:00)
Title: Update web_driver.dart

remove => for void functions that call another function with return value. If the called function actually returns something this fails with "Caught type '_LinkedHashMap' is not a subtype of type 'void' of 'function result'." because the void function cannot return what the called function returned.