docs: function _parse_object_expressions(obj) {
  	debug.assert(obj).is('object');
  	if(!obj.$documents) {
  		return;
  	}
  
  	var expressions = obj.$documents.expressions;
  	if(!expressions) {
  		return;
  	}
  
  	ARRAY(Object.keys(expressions)).forEach(function(prop) {
  		var value = expressions[prop], key;
  		// FIXME: This code should understand things better
  		if(prop.substr(0, 'content.'.length) === 'content.') {
  			key = prop.substr('content.'.length);
  		} else {
  			key = '$' + prop;
  		}
  		obj[key] = value;
  	});
  }