void verifyMultiOptionsConstraintLoggerCall(final String stringToLog) {
    verify(mockLogger, atLeast(1)).warn(stringToLog);
  }
Check logger calls

<p>Here we check the calls to logger and not the result of the log line as we don't test the
logger itself but the fact that we call it.

@param stringToLog the string that is logged
app/src/test/java/org/hyperledger/besu/cli/CommandTestAbstract.java