设计了流程接口节点，能够切换本节点数据、目标节点数据，目前还有数据来源相关操作没有实现

Workbench/Converters/BoolToVisibilityConverter.cs

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+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Data;
+using System.Windows;
+using System.Diagnostics;
+
+namespace Serein.Workbench.Converters
+{
+    public class BoolToVisibilityConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            Debug.WriteLine($"targetType:{targetType}       value:{targetType}      parameter:{parameter}");
+            if (value is bool b)
+            {
+                return b ? Visibility.Visible : Visibility.Collapsed;
+            }
+            return Visibility.Collapsed;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return value is Visibility v && v == Visibility.Visible;
+        }
+    }
+}