function doubleClickDelay(grid, event) {
    var columnProperties;

    return (
        event.isHeaderCell &&
        !(columnProperties = event.columnProperties).unsortable &&
        columnProperties.sortOnDoubleClick &&
        300
    );
}
@memberOf ColumnSelection.prototype
@desc Replace the most recent selection with a single cell selection that is moved (offsetX,offsetY) from the previous selection extent.
@param {Hypergrid} grid
@param {number} offsetX - x coordinate to start at
@param {number} offsetY - y coordinate to start at