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<instance foo>
ConfigViaFlatFile Config::Tiny /etc/apps/foo/foo.cfg 
</instance>
...
<instance bar>
ConfigViaParamBuilder Apps::Foo::Params
</instance>

use SSOP::Conf;   # For Super Secret OSS Project 
my $conf = SSOP::Conf->retrieve( $instance );
...
my $conf_ref = SSOP::Conf->retrieve_hashref( $instance );
my $template = $$conf_ref{template};
my $dbuser = $$conf_ref{dbuser};