// LootTableInfo.Builder
        public LootTableInfo build(LootContextParameterSet var0) {
            Set<LootContextParameter<?>> var2 = Sets.difference(var0.a(), this.b.keySet());
            if (!var2.isEmpty()) {
                throw new IllegalArgumentException("Missing required parameters: " + var2);
            } else {
                Random var3 = this.d;
                if (var3 == null) {
                    var3 = new Random();
                }

                return new LootTableInfo(var3, this.e, this.a, this.a.getMinecraftServer().getLootTableRegistry(), this.b, this.c);
            }
        }