} else {
final double tu = column.traitColumnWidthTableUnits();
/* Keep track of minimum number of proportional units in any
* column which has only proportional units. */
if (tu > 0 && tu < tuMin
&& column.traitColumnWidth(this) == 0) {
tuMin = tu;
}
totalTableUnits += tu;
totalFixedWidth += column.traitColumnWidth(this);
}