} else if (anchor.equals("trailing")) {
operation = new VerticalBilateralToTrailing(constraints, container, child);
}
} else if (alignment instanceof Trailing) {
if (anchor.equals("leading")) {
operation = new VerticalTrailingToLeading(constraints, container, child);
} else if (anchor.equals("bilateral")) {
operation = new VerticalTrailingToBilteral(constraints, container, child);
}
}
}