showOverlayMessage() Method
Description
Displays "Waiting..." or any other message over the chart.
To hide this message, use hideOverlayMessage() method.
The only difference between messages shown by showOverlayMessage() and showWaitingState() methods is an animated ring shown in waiting state.
Parameters
- [optional] message:String
The message to show.
Returns
Boolean.
Note: If the return value is true the command was processed successfully, the command failed to be processed due to component busy state otherwise