public boolean isStoredCredentialsHexEncoded() {
        return storedCredentialsHexEncoded;
    }
Returns {@code true} if the system's stored credential hash is Hex encoded, {@code false} if it
is Base64 encoded.
<p/>
Default value is {@code true} for convenience - all of Shiro's {@link Hash Hash#toString()}
implementations return Hex encoded values by default, making this class's use with those implementations
easier.

@return {@code true} if the system's stored credential hash is Hex encoded, {@code false} if it
is Base64 encoded.  Default is {@code true}
core/src/main/java/org/apache/shiro/authc/credential/HashedCredentialsMatcher.java