[Glass] _hasIndexes usage

[bruno buzzi brassesco]

Dale,

Ok, then i will use your recommendation (i know _xxx is for internal 
usage) but i did not search too much to find #indexSpec message.

A Java Web App display Forms with paging behavior (forms are stored in 
GS) it call a REST GS Service with the page size and the page number 
(the entire collection to display must be sorted by #modifiedTime inst 
var).

If the collection is small asSortedCollection can be used without 
problems. But if the collection is too big asSortedCollection is out of 
the equation.

The collection with forms can have or not an index by #modifiedTime, if 
it has an index then i want to use it with aGsQuery readStream or 
aGsQuery reversedReadStream.

The at some point something like this is done:
     instances _hasIndexes
     ifTrue: [self fetchIndexedFormsInstancesOn: instances from: 
startIndex to: endIndex] "use aGsQuery readStream"
     ifFalse: [self fetchUnIndexedFormsInstancesOn: instances from: 
startIndex to: endIndex] "use asSortedCollection"

regards,
bruno