public Row<T> insertRowAbove() {
Row<T> newRow = new Row<T>(parent, prevRow, this);
if (prevRow == null) {
parent.firstRow = newRow;
} else {
getPrevRow().nextRow = newRow;
}
parent.height++;
prevRow = newRow;
return newRow;
}
private void _remove() {
this.parent.height--;
if (prevRow == null) {
parent.firstRow = nextRow;
} else {
this.prevRow.nextRow = nextRow;
}
if (nextRow == null) {
parent.lastRow = prevRow;
} else {
this.nextRow.prevRow = prevRow;
}
this.firstCell = null;
this.lastCell = null;
this.prevRow = null;
this.nextRow = null;
this.parent = null;
}