Where and how does libUV interact with code on node.js

I wondered a question: "where and how does libUV interact with code on node.js". Lately I was investigating streams, also I read source on github.

Well, let's take source of script called as destroy.js. This script is responding for the destruction of streams: stream.destroy(). After that operation:

• in function destroy are set states for streams into values:
  • writable._stateWritable.destroyed = true
  • readable._stateReadable.destroyed = true
• in function _destroy are set states for streams into values:
  • writable._stateWritable.closed = true
  • readable._stateReadable.closed = true
• in funtion emitCloseNT:
  • sets value writable._stateWritable.closeEmmited = true
  • sets value readable._stateReadable.closeEmmited = true
  • emmits event close

That's all. Where and how does libUV interact with stream.destroy()? Even documentation of node about writable.destroy says:

This is a destructive and immediate way to destroy a stream

But what is it really? I see only the process of setting state for the streams and only it. So, where does libUV actually destroy stream?

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