fix bugs

packages/zefyr/lib/src/widgets/field.dart

 import 'image.dart';
 import 'mode.dart';
 import 'toolbar.dart';
+import 'link.dart';
 
 /// Zefyr editor with material design decorations.
 class ZefyrField extends StatefulWidget {
 
   /// Height of this editor field.
   final double height;
+  final EdgeInsets padding;
   final ZefyrController controller;
   final FocusNode focusNode;
   final bool autofocus;
   final ZefyrMode mode;
   final ZefyrToolbarDelegate toolbarDelegate;
   final ZefyrImageDelegate imageDelegate;
+  final ZefyrLinkDelegate linkDelegate;
   final ScrollPhysics physics;
+  final void Function() onSave;
 
   /// The appearance of the keyboard.
   ///
   const ZefyrField({
     Key key,
     this.decoration,
+    this.padding,
     this.height,
     this.controller,
     this.focusNode,
     this.mode,
     this.toolbarDelegate,
     this.imageDelegate,
+    this.linkDelegate,
     this.physics,
     this.keyboardAppearance,
+    this.onSave,
   }) : super(key: key);
 
   @override
   @override
   Widget build(BuildContext context) {
     Widget child = ZefyrEditor(
-      padding: EdgeInsets.symmetric(vertical: 6.0),
+      padding: widget.padding ?? EdgeInsets.zero,
       controller: widget.controller,
       focusNode: widget.focusNode,
       autofocus: widget.autofocus,
         child: child,
       );
     }
-
     return AnimatedBuilder(
       animation:
           Listenable.merge(<Listenable>[widget.focusNode, widget.controller]),