[stringtemplate-interest] Region Usage

[Massimiliano Donini]

  Hi, i have read following on link 
http://www.antlr.org/wiki/display/ST/Template+regions region usage but 
i'm unable to find code usage.
I have 2 simple questions:
     1) can i define region inside the same templategroup file?
     2) how can i turn on/off region template (starting  from 1° wiki 
region example, how could i generate code with <@preamble()> and without 
it?)

Best Regards
Max
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