NOTE: 
`if (tree.symbol==null || tree.symbol.fullName==null || !excludes.nonEmpty) true else { !excludes.exists(tree.symbol.fullName.startsWith(_)) }` 
into
`(tree.symbol==null || tree.symbol.fullName==null || !excludes.nonEmpty) || !excludes.exists(tree.symbol.fullName.startsWith(_))`
Looks better.