Dependency Injection and open-sourcing generic parts of apps

using DI in CPAN libs makes them more universal - but DI even more important is when you want to open-source some generic part of your application. Your boss agrees and then you encounter code like this:

	sub frobnicate {
	#...
	my $dbh = MyApp->dbh;
	#...
	}
	# or
	sub frobnicate {
	#...
	my $some_variable = MyApp::OurConstant;
	#...
	}
	# or
	sub frobnicate {
	#...
	my $sql = MyApp::Common::DBConnect(config => 'master');
	#...
	}

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