Determine if one of the outgoing transition patterns matches this message.
Match-variables are set implicitly by this method.
Use normal regex for pattern. The group operator capures parts of the regex to put into a variable.
Sample: msg="ab1234cd"
var="" regex="ab(.*)cd" .. no variable will be set
var="userid" regex="ab(.*)cd" .. variable userid is set to "1234"
var="userid" regex="ab.*cd" .. variable userid is not modified - missing group expression
var="userid,poscode" regex="ab(.*)([cd]+)" .. variable userid is set to "1234", variable poscode to "cd"
var="userid,psocode" regex="ab(.*)cd(.*)" .. variable userid is set to "1234", variable poscode to "" - empty group match