Source: dist/css/library_boot.css, line 7098
Example
Default styling
columns_3:lg columns_2:md columns_1 gap-x_4:lg gap-x_3:md gap_4 grid ul_none text_left
NOTE:
Triple up splitscolumns_3:lg columns_2:md columns_1 gap-x_4:lg gap-x_3:md gap_4 grid ul_none text_left