| Explicitly frees the memory used by the given direct byte buffer.
If the memory is known to already have been freed then this is a no-op.
Once the memory has been freed then operations requiring access to the
memory will throw an IllegalStateException.
Note this is is possible that the memory is freed by code that reaches
into the address and explicitly frees it 'beneith' us -- this is bad
form.
Parameters:
directBuffer - the direct byte buffer memory to free
throws:
IllegalArgumentException - if the buffer is null or is not adirect byte buffer. | 