whole_func_string: function(attrs) {
      for (var k in attrs)
        if (attrs.hasOwnProperty(k))
          this.out.push(' ' + k + '="' + attrs[k] + '"');
    }
func_code_string: function(attrs) {
      for (var k in attrs)
        if (attrs.hasOwnProperty(k))
          this.out.push(' ' + k + '="' + attrs[k] + '"');
    }
func_documentation_string: Emits HTML tag attributes from specified object.