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In this document (http://openidex.netbeans.org/proposals/looks/design.html#spi-CompositeLook) the name of Composite (Composites is right).
This document is obsolete and abandoned, I guess. At least it doesn't reflect to latest version of Looks API and nobody is maintaining it as far as I know.
Vita is right. The looks version under openidex is dead. The current version is under openide
closing