27    * Ensures that an object reference passed as a parameter to the calling method is not null.
29    * @param reference an object reference
30    * @return the non-null reference that was validated
31    * @throws NullPointerException if {@code reference} is null
33   public static <T> T checkNotNull(@Nullable T reference) {  in checkNotNull()  argument
34     if (reference == null) {  in checkNotNull()
37     return reference;  in checkNotNull()
41    * Ensures that an object reference passed as a parameter to the calling method is not null.
43    * @param reference an object reference
45    * @return the non-null reference that was validated
46    * @throws NullPointerException if {@code reference} is null
48   public static <T> T checkNotNull(T reference, String errorMessage) {  in checkNotNull()  argument
49     if (reference == null) {  in checkNotNull()
52     return reference;  in checkNotNull()
56    * Ensures that an object reference returned from a provides method is not null.
58    * @param reference an object reference
59    * @return the non-null reference that was validated
60    * @throws NullPointerException if {@code reference} is null
62   public static <T> T checkNotNullFromProvides(T reference) {  in checkNotNullFromProvides()  argument
63     if (reference == null) {  in checkNotNullFromProvides()
66     return reference;  in checkNotNullFromProvides()
70    * Ensures that an object reference returned from a component method is not null.
72    * @param reference an object reference
73    * @return the non-null reference that was validated
74    * @throws NullPointerException if {@code reference} is null
76   public static <T> T checkNotNullFromComponent(T reference) {  in checkNotNullFromComponent()  argument
77     if (reference == null) {  in checkNotNullFromComponent()
80     return reference;  in checkNotNullFromComponent()
84    * Ensures that an object reference passed as a parameter to the calling method is not null.
86    * @param reference an object reference
93    * @return the non-null reference that was validated
94    * @throws NullPointerException if {@code reference} is null
99       T reference, String errorMessageTemplate, Object errorMessageArg) {  in checkNotNull()  argument
100     if (reference == null) {  in checkNotNull()
116     return reference;  in checkNotNull()