code: function getImageHTMLNode(editor, model, pos) {
  	const node = model.nodeForPoint(pos);
  	return node && node.name.toLowerCase() === 'img' ? node : null;
  }
docs: Returns <img> node under caret in given editor or `null` if such node cannot
  be found
  @param  {TextEditor}  editor
  @param  {SyntaxModel} model
  @return {Node}