Fix documentation for MultipleSelectionFormField

see 9aed57546cdb727d99774af3d2209127f5a40efa
see #302

diff --git a/docs/php/api/form_builder/form_fields.md b/docs/php/api/form_builder/form_fields.md
index 2ab9a27f895ad1958304488460455a5390a934f0..65efaf625a740f0e5bde9be7d3d7c5ce187c61b0 100644 (file)
--- a/docs/php/api/form_builder/form_fields.md
+++ b/docs/php/api/form_builder/form_fields.md
@@ -145,8 +145,7 @@ These methods do **not**, however, restrict the number of text rows that can be
 ### `MultipleSelectionFormField`
 
 `MultipleSelectionFormField` is a form fields that allows the selection of multiple options out of a predefined list of available options.
-The class implements `IAttributeFormField`, `ICssClassFormField`, `IFilterableSelectionFormField`, `IImmutableFormField`, and `INullableFormField`.
-If the field is nullable and no option is selected, `null` is returned as the save value.
+The class implements `IAttributeFormField`, `ICssClassFormField`, `IFilterableSelectionFormField`, and `IImmutableFormField`.
 
 
 ### `RadioButtonFormField`