optgroup_columns.less revision a500a8ecaba8363492aa1f4a62d5af939b2a91e6
.optgroup {
border-right: 1px solid #f2f2f2;
border-top: 0 none;
float: left;
.selectize-box-sizing(border-box);
}
.optgroup:last-child {
border-right: 0 none;
}
.optgroup:before {
display: none;
}
.optgroup-header {
border-top: 0 none;
}
}