Add only trashed docs.

Author: yajra

documentation.md

@@ -55,6 +55,7 @@
 	- [Whitelist Columns](/docs/{{package}}/{{version}}/whitelist)
 	- [Set Total Records](/docs/{{package}}/{{version}}/set-total-records)
 	- [With Trashed](/docs/{{package}}/{{version}}/with-trashed)
+	- [Only Trashed](/docs/{{package}}/{{version}}/only-trashed)
 	- [Skip Paging](/docs/{{package}}/{{version}}/skip-paging)
 
 ### PLUGINS

only-trashed.md

@@ -0,0 +1,16 @@
+# Eloquent Model With Only Trashed
+
+When our `Model` uses `SoftDeletes` trait of Laravel, we need to implicitly tell `Datatables` to include only trashed records in the results.
+To achieve this, we can use `onlyTrashed` api.
+
+```php
+use Datatables;
+
+Route::get('user-data', function() {
+	$model = App\User::onlyTrashed()->query();
+
+	return Datatables::eloquent($model)
+				->onlyTrashed()
+				->make(true);
+});
+```