DesignerBuilderType class
SharePoint 2013
Contains references to builders for a design application compatible with Microsoft SharePoint Foundation, such as SharePoint Designer.
Namespace: Microsoft.SharePoint.WebPartPages
Assembly: Microsoft.SharePoint (in Microsoft.SharePoint.dll)
When a Web Part is hosted in a design application that supports Web Part builders and a builder is selected on the Property sheet, the window.external.InvokeBuilder method will call the design application and pass the BuilderType, BuilderArguments, and the ElementID information.
The fields of the DesignerBuilderType class are passed to the HtmlEditorBuilderType property.
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