$item object|array Required

$column_name string Required

This is method that is used to render a column when no other specific method exists for that column. When WP_List_Tables attempts to render your columns (within single_row_columns()), it first checks for a column-specific method. If none exists, it defaults to this method instead. This method accepts two arguments, a single $item array and the $column_name (as a slug).

NOTICE: As of WordPress 3.5.1, in core $item is passed an Object, not an array.

File: wp-admin/includes/class-wp-list-table.php. View all references

protected function column_default( $item, $column_name ) {}