public SELF methods(Iterable<HttpMethod> methods) {
        requireNonNull(methods, "methods");
        checkArgument(!Iterables.isEmpty(methods), "methods can't be empty.");
        this.methods = Sets.immutableEnumSet(methods);
        return self();
    }
Sets the {@link HttpMethod}s that an {@link HttpService} will support. If not set,
{@link HttpMethod#knownMethods()}s are set.

@see #path(String)
@see #pathPrefix(String)
core/src/main/java/com/linecorp/armeria/server/AbstractBindingBuilder.java