How to fix mbed error: 'wait' was not declared in this scope (PlatformIO)

Problem:

While compiling your mbed / PlatformIO application, you see an error message like

src/actuators.cpp:253:5: error: 'wait' was not declared in this scope
  253 |     wait(1.0);
      |     ^~~~

Solution

wait is an old API and has been deprecated in favour of the C++ standard ThisThread::sleep_for. Use

ThisThread::sleep_for(1s);