def METHOD_NAME(self) -> None:
    """Add a blank entry in the content box."""
    spacer = QWidget()
    spacer.setFixedHeight(int(0.5*self._sIcon))
    self._content.addWidget(spacer, self._index, 0, 1, 3, Qt.AlignLeft)
    self._widgets.append(spacer)
    self._bumpIndex()
    return