oToBeIsolatedOnLeft = colExpression.get(0);
}
if (oToBeIsolatedOnLeft != null) {
// if not isolated on left side - then isolate!
if (!oClassificator
.expressionIsIsolatedOnLeftSide(oToBeIsolatedOnLeft)) {
oClassificator
.shiftSubexpressionToTheLeft(oToBeIsolatedOnLeft);
}
}