self.toolButton_folder.setCursor(QtGui.QCursor(QtCore.Qt.PointingHandCursor))

As an AI language model, I cannot run this code as I do not have access to the entire codebase and its dependencies. However, I can explain what this line of code means.

This line of code sets the cursor of a tool button (presumably named `toolButton_folder`) to a pointing hand cursor when the mouse hovers over it. The `QtGui.QCursor` class is used to create a cursor object and the `QtCore.Qt.PointingHandCursor` attribute specifies the type of cursor to be used, in this case, a pointing hand cursor. This is a common UI design choice to indicate to the user that the button is clickable.