* {@link Ext.grid.Column} column configuration object within the specified Array defines the initial
* order of the column display. A Column's display may be initially hidden using the
* <tt>{@link Ext.grid.Column#hidden hidden}</tt></b> config property (and then shown using the column
* {@link Ext.grid.Column} column configuration object within the specified Array defines the initial
* order of the column display. A Column's display may be initially hidden using the
* <tt>{@link Ext.grid.Column#hidden hidden}</tt></b> config property (and then shown using the column