void function ( boolean arg0 ) { checkState ( arg0 , null ) ; }
verifies that the given condition a check against the program 's current state is true , throwing an illegalstateexception if not . concode_field_sep ExceptionListener listener concode_field_sep void fail concode_elem_sep T checkNotNull concode_elem_sep T checkNotNull concode_elem_sep void checkArgument concode_elem_sep void checkArgument