title: Is Microsoft.Azure.WebJobs.IAsyncCollector<T> thread-safe?
body: <p>The interface's summary describes itself as 'an insert-only collection' but i can't seem to find any information regarding it's thread safeness.</p>
  
  <p>Edit:</p>
  
  <p>This interface is implemented by many classes inside the SDK with 'MessageSenderAsyncCollector' being the one i was curious about. The only thing it does as pointed by @rasmusgude is to call a static method from another class.</p>