function convertPxToCSSSizeString(iPxSize, iTotalPzSize, bIsInsetColumn) {
		var iContentSize;
		if (iPxSize === iTotalPzSize) {
			return "100%";
		}
		iContentSize = bIsInsetColumn ? (iPxSize - FlexibleColumnLayout.COLUMN_SEPARATOR_WIDTH) : iPxSize;

		return iContentSize + "px";
	}
Deregisters all <code>transitionend</code> listeners.
@returns {Promise}
@private