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1   package com.github.davidmoten.util;
2   
3   public final class Preconditions {
4   
5       public static void checkNotNull(Object o) {
6           checkNotNull(o, null);
7       }
8   
9       public static void checkNotNull(Object o, String message) {
10          if (o == null)
11              throw new NullPointerException(message);
12      }
13  
14      public static void checkArgument(boolean b, String message) {
15          if (!b)
16              throw new IllegalArgumentException(message);
17      }
18  
19  }