in common/teamcity_messages.cpp [162:171]
void TeamcityMessages::testOutput(const std::string &name, const std::string &output, const std::string &flowid, bool isStdError) {
openMsg(isStdError ? "testStdErr" : "testStdOut");
writeProperty("name", name);
writeProperty("out", output);
if(flowid.length() > 0) {
writeProperty("flowId", flowid);
}
closeMsg();
}