- max_height: max(mock_symbola.height, mock_ubuntu_regular.height, mock_ubuntu_bold.height)
- min_height: min(mock_symbola.height, mock_ubuntu_regular.height, mock_ubuntu_bold.height)
- symbola_line_height: self.min_height / max(mock_symbola.height,1)
- ubuntu_regular_line_height: self.min_height / max(mock_ubuntu_regular.height,1)
- ubuntu_bold_line_height: self.min_height / max(mock_ubuntu_bold.height,1)