close method
void
close()
Free Runtime and Context. After dispose, the engine cannot be reopened. After close without dispose, the next evaluate recreates the engine.
Implementation
void close() {
try {
releaseHostCaches();
} catch (_) {}
final rt = _rt;
if (rt == null) return;
try {
_executePendingJob();
} catch (_) {}
final referenceLeak = _freeContext(rt);
_rt = null;
localContext.clear();
dartContext.clear();
_needsInitialization = true;
try {
jsFreeRuntime(rt);
} on String catch (e) {
throw JSError(e);
}
if (referenceLeak != null) throw JSError(referenceLeak);
}