Return a marker that we can release later.
<p>The specific marker value used for this class allows for some level of protection against misuse where {@code seek()} is called on a mark or {@code release()} is called in the wrong order.</p>
See Implementation
Return a marker that we can release later.
<p>The specific marker value used for this class allows for some level of protection against misuse where {@code seek()} is called on a mark or {@code release()} is called in the wrong order.</p>