Configuration maps can also specify lineups. Configuration map lineups specify the required maps for a configuration expression. The first expression to evaluate to true is used.
To see configuration map expressions, select Browse Configuration
Maps from the Tools menu. The following graphic shows
a Configuration Maps Browser with the map AbtSystemBase, which was
in an earlier release of VisualAge Smalltalk. This map has two
configuration expressions.
Configuration map lineups explains how to write lineups for configuration maps.