Replaces the value corresponding to this entry with the specified
value (optional operation). This implementation simply throws
<tt>UnsupportedOperationException</tt>, as this class implements
an <i>immutable</i> map entry.
@param value new value to be stored in this entry
@return (Does not return)
@throws UnsupportedOperationException always
Replaces the value corresponding to this entry with the specified value (optional operation). This implementation simply throws <tt>UnsupportedOperationException</tt>, as this class implements an <i>immutable</i> map entry.
@param value new value to be stored in this entry @return (Does not return) @throws UnsupportedOperationException always