public class SetDestination : ParallelConfigModule<NormalizedPath>, IModule, IParallelModule

This module is typically used before WriteFiles to set the Destination prior to writing the document. If an extension is provided, this module will change the extension of the destination path for each input document. If the metadata keys DestinationPath, DestinationFileName, or DestinationExtension are set (in that order of precedence), the value will be used instead of the specified extension. For example, if you have a bunch of Razor .cshtml files that need to be rendered to .html files but one of them should be output as a .xml file instead, define the DestinationExtension metadata value in the front matter of the page. If a delegate is provided, it takes precedence over the metadata values (but can use them if needed).