static <C> @NonNull AggregateParserBuilder<C> builder() {
        return new AggregateParserBuilder<>();
    }
Returns a new aggregate command parser builder. The builder is immutable, and each method returns
a new builder instance.

@param <C> the command sender type
@return the builder
cloud-core/src/main/java/org/incendo/cloud/parser/aggregate/AggregateParser.java