presto-main/src/main/java/io/prestosql/sql/gen/JoinFilterFunctionCompiler.java/JoinFilterFunctionCompiler/getJoinFilterFunctionFactoryStats
class JoinFilterFunctionCompiler:    @Managed
    @Nested
    public CacheStatsMBean getJoinFilterFunctionFactoryStats()
    {
        return new CacheStatsMBean(joinFilterFunctionFactories);
    }