topFrame property Null safety

Frame? topFrame
@optional, read / write

The top stack frame associated with this event, if applicable.

This is provided for the event kinds:

  • PauseBreakpoint
  • PauseInterrupted
  • PauseException

For PauseInterrupted events, there will be no top frame if the isolate is idle (waiting in the message loop).

For the Resume event, the top frame is provided at all times except for the initial resume event that is delivered when an isolate begins execution.

Implementation

@optional
Frame? topFrame;