src/vs/workbench/api/common/extHostTypes.ts/SourceBreakpoint/constructor
class SourceBreakpoint:	constructor(location: Location, enabled?: boolean, condition?: string, hitCondition?: string, logMessage?: string) {
		super(enabled, condition, hitCondition, logMessage);
		if (location === null) {
			throw illegalArgument('location');
		}
		this.location = location;
	}