/guava/android/guava/src/com/google/common/base/Preconditions.java
if ( reference == null) {   throw new NullPointerException( valueOf( errorMessage) ) ; }
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if (!expression) { throw new IllegalArgumentException(); } } public static void checkArgument(boolean expression, @CheckForNull Object errorMessage) { if (!expression) { <extra_id_0> } } public static void checkArgument( boolean expression, String errorMessageTemplate, @CheckForNull @Nullable Object... errorMessageArgs) {