in plugin/src/main/groovy/grails/plugins/redis/ast/MemoizeObjectASTTransformation.groovy [180:185]
private void injectImport(SourceUnit sourceUnit, Class importClass) {
if(!sourceUnit.AST.imports.any {it.className == ClassHelper.make(importClass).name}
&& !sourceUnit.AST.starImports.any {it.packageName == "${ClassHelper.make(importClass).packageName}."}) {
sourceUnit.AST.addImport(importClass.simpleName, ClassHelper.make(importClass))
}
}