val f: java.util.function.Function<String, String> = java.util.function.Function { it }
 foo.Main.from(f)
res2: kotlin.collections.(Mutable)Map<kotlin.String!, kotlin.String!>! = {}

public static <K, V> Map<K, V> from(Function<K, V> function) {
        return emptyMap();
    }

com.google.common.cache.CacheLoader.from<String, String> { it }

val f: com.google.common.base.Function<String, String> = com.google.common.base.Function { it }
com.google.common.cache.CacheLoader.from(f)