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sources/main/java/javax/annotation/ParametersAreNonnullByDefault.java

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+package javax.annotation;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+import javax.annotation.meta.TypeQualifierDefault;
+
+/**
+ * This annotation can be applied to a package, class or method to indicate that
+ * the method parameters in that element are nonnull by default unless there is:
+ * <ul>
+ * <li>An explicit nullness annotation
+ * <li>The method overrides a method in a superclass (in which case the
+ * annotation of the corresponding parameter in the superclass applies)
+ * <li>There is a default parameter annotation (like
+ * {@link ParametersAreNullableByDefault}) applied to a more tightly nested
+ * element.
+ * </ul>
+ *
+ * @see Nonnull
+ */
+@Documented
+@Nonnull
+@TypeQualifierDefault(ElementType.PARAMETER)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface ParametersAreNonnullByDefault {
+}