> + @ConstructorProperties({
> + "name", "cooldown", "minEntities", "maxEntities", "metadata"
> + })
> + protected GroupConfiguration(String name, int cooldown, int minEntities,
> int maxEntities, Map<String,String> metadata) {
> +
> + this.name = checkNotNull(name, "name required");
> + checkArgument(cooldown >= 0, "cooldown should be non-negative");
> + checkArgument(minEntities >= 0, "minEntities should be non-negative");
> + checkArgument(maxEntities >= 0, "maxEntities should be non-negative");
> + this.cooldown = cooldown;
> + this.minEntities = minEntities;
> + this.maxEntities = maxEntities;
> + this.metadata = metadata;
> + if(metadata == null) {
> + this.metadata = Maps.newHashMap();
> + }
Inline to avoid the reassignation? `this.metadata = metadata == null?
Maps.newHashMap() : metadata;`
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