data: saving file contents to sqlite db

src/lib/data/access/StorageAccessProxy.h

@@ -42,9 +42,10 @@ public:
 	) const;
 
 	virtual TokenLocationCollection getErrorTokenLocations(std::vector<std::string>* errorMessages) const;
-
 	virtual std::shared_ptr<TokenLocationFile> getTokenLocationOfParentScope(const TokenLocation* child) const;
 
+	virtual std::shared_ptr<TextAccess> getFileContent(const FilePath& filePath) const;
+
 private:
 	StorageAccess* m_subject;
 };