afterClosed = function () {
						oPopup.detachClosed(afterClosed, this);
						this.openBy(oControl);
					}
Opens the Popover and sets the Popover position according to the {@link #getPlacement() placement} property around the <code>oControl</code> parameter.

@param {sap.ui.core.Control|HTMLElement} oControl This is the control to which the Popover will be placed. It can be not only a UI5 control, but also an existing DOM reference. The side of the placement depends on the placement property set in the Popover.
@param {boolean} [bSkipInstanceManager=false] Indicates whether popover should be managed by InstanceManager or not.
@returns {this} Reference to the control instance for chaining
@public