code: function getNodeFromInstance(inst) {
  	  // Without this first invariant, passing a non-DOM-component triggers the next
  	  // invariant for a missing parent, which is super confusing.
  	  !(inst._hostNode !== undefined) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'getNodeFromInstance: Invalid argument.') : _prodInvariant('33') : void 0;
  
  	  if (inst._hostNode) {
  	    return inst._hostNode;
  	  }
  
  	  // Walk up the tree until we find an ancestor whose DOM node we have cached.
  	  var parents = [];
  	  while (!inst._hostNode) {
  	    parents.push(inst);
  	    !inst._hostParent ? process.env.NODE_ENV !== 'production' ? invariant(false, 'React DOM tree root should always have a node reference.') : _prodInvariant('34') : void 0;
  	    inst = inst._hostParent;
  	  }
  
  	  // Now parents contains each ancestor that does *not* have a cached native
  	  // node, and `inst` is the deepest ancestor that does.
  	  for (; parents.length; inst = parents.pop()) {
  	    precacheChildNodes(inst, inst._hostNode);
  	  }
  
  	  return inst._hostNode;
  	}
docs: Given a ReactDOMComponent or ReactDOMTextComponent, return the corresponding
  DOM node.