Make fbcore/.../common/util/Hex nullsafe
package com.facebook.common.util;
+import com.facebook.infer.annotation.Nullsafe;
+
/**
* Basic hex operations: from byte array to string and vice versa.
*
* <p>TODO: move to the framework and consider implementing as native code.
*/
+@Nullsafe(Nullsafe.Mode.STRICT)
public class Hex {
private static final char[] HEX_DIGITS =
