original_string: function is_sortable($column = null) {
          if (empty($column)) {
              return $this->is_sortable;
          }
          if (!$this->is_sortable) {
              return false;
          }
          return !in_array($column, $this->column_nosort);
      }
code: function is_sortable($column = null) {
          if (empty($column)) {
              return $this->is_sortable;
          }
          if (!$this->is_sortable) {
              return false;
          }
          return !in_array($column, $this->column_nosort);
      }
code_tokens: function is_sortable ( $ column = null ) { if ( empty ( $ column ) ) { return $ this -> is_sortable ; } if ( ! $ this -> is_sortable ) { return false ; } return ! in_array ( $ column , $ this -> column_nosort ) ; }
docstring: Is the column sortable?
  @param string column name, null means table
  @return bool
docstring_tokens: Is the column sortable?