whole_func_string: function(start, end) {
      this.start = date.create(start);
      this.end   = date.create(end);
    }
func_code_string: function(start, end) {
      this.start = date.create(start);
      this.end   = date.create(end);
    }
func_documentation_string: *
  @package DateRange
  @dependency date
  @description Date Ranges define a range of time. They can enumerate over specific points within that range, and be manipulated and compared.
  
  *