text: package android.support.annotation;
  
  import java.lang.annotation.Annotation;
  import java.lang.annotation.Retention;
  import java.lang.annotation.RetentionPolicy;
  import java.lang.annotation.Target;
  
  @Retention(RetentionPolicy.CLASS)
  @Target({java.lang.annotation.ElementType.METHOD, java.lang.annotation.ElementType.PARAMETER, java.lang.annotation.ElementType.FIELD})
  public @interface Nullable {}
  