 can be as simple as C string literal or any custom
          expression that you can produce with in a manner similar to standard <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">iostream</span></code> operation.
        </p>
<div class="important"><table border="0" summary="Important">
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<td rowspan="2" align="center" valign="top" width="25"><img alt="[Important]" src="../../../../../../../doc/src/images/important.png"></td>
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