diameterRatioZeroMessage constant

String const diameterRatioZeroMessage = "You can't set a diameterRatio " 'of 0 or of a negative number. It would imply a cylinder of 0 in diameter ' 'in which case nothing will be drawn.'

An error message to show when the provided diameterRatio is zero.

Implementation 

static const String diameterRatioZeroMessage = "You can't set a diameterRatio "
    'of 0 or of a negative number. It would imply a cylinder of 0 in diameter '
    'in which case nothing will be drawn.'