# CssScale constructor

CssScale(num x, num y, [ num z ])

## Implementation

    factory CssScale(num x, num y, [num z]) {
      if ((y is num) && (x is num) && z == null) {
        return CssScale._create_1(x, y);
      }
      if ((z is num) && (y is num) && (x is num)) {
        return CssScale._create_2(x, y, z);
      }
      throw new ArgumentError("Incorrect number or type of arguments");
    }