void (@NotNull GroupRemoteRule to, @NotNull GroupRemoteRule from) { if (to.enums == null) { to.enums = new HashMap<>(); } if (to.regexps == null) { to.regexps = new HashMap<>(); } if (from.enums != null) { to.enums.putAll(from.enums); } if (from.regexps != null) { to.regexps.putAll(from.regexps); } }