https://help.syncfusion.com/cr/wpf/Syncfusion.Presentation.PlaceholderType.html
Enum PlaceholderType - WPF API Reference | Syncfusion
Specifies the type of placeholder.
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https://developers.google.com/apps-script/reference/slides/placeholder-type
Enum PlaceholderType | Apps Script | Google for Developers
Learn how to use Apps Script Enum PlaceholderType. The placeholder types.
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