code: function getImageSrcHTML(node) {
  	const srcAttr = getAttribute(node, 'src');
  	if (!srcAttr) {
  		console.warn('No "src" attribute in', node && node.open);
  		return;
  	}
  
  	return srcAttr.value.value;
  }
docs: Returns image source from given <img> node
  @param  {Node} node
  @return {String}