code: function isValidSize(size) {
    return isArray(size) && size.length === 2 && isInteger(size[0]) && isInteger(size[1]);
  }
docs: Determines whether or not the given object is valid size format.
  
  @param  {*}       size The object to be validated.
  @return {boolean}      True if this is a valid size format, and false otherwise.