def validate_format_percentage(name, value)
      DataTypeValidator.validate name, Float, value, lambda { |arg| arg >= 0.0 && arg <= 1.0}
    end
def validate_format_percentage(name, value)
      DataTypeValidator.validate name, Float, value, lambda { |arg| arg >= 0.0 && arg <= 1.0}
    end
validates that the value provided is between 0.0 and 1.0