android/guava/src/com/google/common/base/Preconditions.java
@CanIgnoreReturnValue
  @NonNullDecl
  public static <T extends Object> T checkNotNull(
      @NonNullDecl T obj, @NullableDecl String errorMessageTemplate, char p1) {
    if (obj == null) {
      throw new NullPointerException(lenientFormat(errorMessageTemplate, p1));
    }
    return obj;
  }
@CanIgnoreReturnValue
  @NonNullDecl
  public static <T extends Object> T checkNotNull(
      @NonNullDecl T obj, @NullableDecl String errorMessageTemplate, char p1) {
    if (obj == null) {
      throw new NullPointerException(lenientFormat(errorMessageTemplate, p1));
    }
    return obj;
  }
@ CanIgnoreReturnValue @ NonNullDecl public static < T extends Object > T checkNotNull ( @ NonNullDecl T obj , @ NullableDecl String errorMessageTemplate , char p1 ) { if ( obj == null ) { throw new NullPointerException ( lenientFormat ( errorMessageTemplate , p1 ) ) ; } return obj ; }
Ensures that an object reference passed as a parameter to the calling method is not null.

<p>See {@link #checkNotNull(Object, String, Object...)} for details.

@since 20.0 (varargs overload since 2.0)
Ensures that an object reference passed as a parameter to the calling method is not null .