[issue #788] Add more nullity annotations where relevant

(chainable setters, static constructors, builder stuff)

test/transform/resource/after-ecj/StaticConstructor.java

@@ -0,0 +1,11 @@
+import lombok.AllArgsConstructor;
+public @AllArgsConstructor(staticName = "of") class StaticConstructor {
+  String name;
+  private @java.lang.SuppressWarnings("all") StaticConstructor(final String name) {
+    super();
+    this.name = name;
+  }
+  public static @org.checkerframework.checker.nullness.qual.NonNull @java.lang.SuppressWarnings("all") StaticConstructor of(final String name) {
+    return new StaticConstructor(name);
+  }
+}