+ MODEL_EXPORT const std::shared_ptr<Model_Document>& getDocument(std::string theDocID);
+ //! Returns true if document has been created
+ MODEL_EXPORT bool hasDocument(std::string theDocID);
+ //! Deletes the document from the application
+ MODEL_EXPORT void deleteDocument(std::string theDocID);
+ //! Deletes all documents existing in the application
+ MODEL_EXPORT void deleteAllDocuments();