_      _____ ____    _      ____  ____  _  __ _____ ____  ____
/ \  /|/  __//  _ \  / \  /|/  _ \/  __\/ |/ //  __//  __\/ ___\
| |  |||  \  | | //  | |  ||| / \||  \/||   / |  \  |  \/||    \
| |/\|||  /_ | |_\\  | |/\||| \_/||    /|   \ |  /_ |    /\___ |
\_/  \|\____\\____/  \_/  \|\____/\_/\_\\_|\_\\____\\_/\_\\____/

• sep-file branch: separate worker example.
• master branch: inline worker example.
• ondemand-thread branch — post back and forth example.