public static RegionForwardingRuleId of(String region, String rule) {
    return new RegionForwardingRuleId(null, region, rule);
  }
public static RegionForwardingRuleId of ( String region , String rule ) { return new RegionForwardingRuleId ( null , region , rule ) ; }
Returns a region forwarding rule identity given the region and rule names. The forwarding rule
name must be 1-63 characters long and comply with RFC1035. Specifically, the name must match
the regular expression {@code [a-z]([-a-z0-9]*[a-z0-9])?} which means the first character must
be a lowercase letter, and all following characters must be a dash, lowercase letter, or digit,
except the last character, which cannot be a dash.

@see <a href="https://www.ietf.org/rfc/rfc1035.txt">RFC1035</a>