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1   package com.github.davidmoten.security;
2   
3   final class Preconditions {
4   
5       private Preconditions() {
6           // prevent instantiation
7       }
8   
9       static void checkNotNull(Object o, String message) {
10          if (o == null)
11              throw new NullPointerException(message);
12      }
13  
14      static void checkNotNull(Object o) {
15          checkNotNull(o, null);
16      }
17  
18  }