How to use

com.oracle.truffle.api.debug.ObjectStructures$MessageNodes

constructor

Debugger(Env env) {
  this.env = env;
  this.msgNodes = new ObjectStructures.MessageNodes();
  this.alwaysHaltBreakpoint = new Breakpoint(BreakpointLocation.ANY, SuspendAnchor.BEFORE);
  this.alwaysHaltBreakpoint.setEnabled(true);
}

Debugger(Env env) {
  this.env = env;
  this.msgNodes = new ObjectStructures.MessageNodes();
  this.alwaysHaltBreakpoint = new Breakpoint(BreakpointLocation.ANY, SuspendAnchor.BEFORE, false, null);
  this.alwaysHaltBreakpoint.setEnabled(true);
}