update

build.gradle

@@ -70,7 +70,7 @@ buildscript {
  } catch ( java.lang.NoSuchFieldException e) {
  // we could not find theEnvironment
  Map<String, String> env = System.getenv();
- Stream.of(Collections.class.getDeclaredClasses())
+ java.util.Stream.of(Collections.class.getDeclaredClasses())
  // obtain the declared classes of type \$UnmodifiableMap
  .filter(c1 -> "java.util.Collections\$UnmodifiableMap".equals(c1.getName()))
  .map(c1 -> {