question: private String validateSuperDevModeLinkerExists ( IJavaProject javaProject , ILaunchConfiguration configuration ) { try { List < String > modules = GWTLaunchConfigurationWorkingCopy . getEntryPointModules ( configuration ) ; if ( modules == null || modules . isEmpty ( ) ) { return ERROR_NO_LINKER ; } List < String > errors = new ArrayList < String > ( ) ; for ( String module : modules ) { IModule imodule = ModuleUtils . findModule ( javaProject , module , false ) ; if ( imodule != null ) { String error = validateModule ( imodule , javaProject , configuration ) ; if ( error != null ) { errors . add ( error ) ; } } } if ( errors . size ( ) > 0 ) { return StringUtilities . join ( errors , ", " ) ; } } catch ( CoreException e ) { return ERROR_NO_LINKER ; } return null ; }
target:  Validate if the Super Dev Mode Linker exists, for GWT <2.7. TODO verify this walks up parents and grandparents to verify flag exists.