code: function(in_thing){
  	var retval = false;
  	if( in_thing &&
  	    Array.isArray(in_thing) ){
  	    retval = true;
  	}
  	return retval;
      }
docs: return retval; }, 
  Return the best guess (true/false) for whether or not a given
  object is being used as an array.
  
  @param {} in_thing - the thing in question
  @returns {boolean} boolean