| PluginChangeLogVersion | 
 This class is for caching the information about plugin changes of a plugin version. 
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| PluginDependencies | 
 This class is for storing informations and data about dependencies of an plugin for displaying it at the plugin ui. 
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| PluginDependenciesData | 
 This is a model class for storing the informations to show in the delete/deactivate dialog of an plugin. 
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| PluginFileKeyData | 
 This class is for storing data of a plugin file with a file key. 
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| PluginOverwriteData | 
 This model class holds data after the user has confirmed that a plugin should be overwritten by a manually uploaded
 plugin jar file. 
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| PluginUpdateMessageData | 
 This class is used to cache the plugin update message JSON data from the database for processing for the user
 interface of the internal messages 
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| PluginUpdateMetadata | 
 This class is for caching the plugin information from PROMA for the plugin management interface. 
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