Function setVisible

setVisible(isVisible): void
JMap.Application.UI.Sidepanel.setVisible

Sets the application left side panel visibility.
Parameters
- isVisible: boolean
  if true, shows the panel, else hides it
Returns void
Example
```
// Show the left side panel
JMap.Application.UI.Sidepanel.setVisible(true)

// Hide the left side panel
JMap.Application.UI.Sidepanel.setVisible(false)
```