dentifier">std</span><span class="special">::</span><span class="identifier">map</span></code> of string keys (parameter names)
          to string values (the parameter values). We seek for the <code class="computeroutput"><span class="identifier">format</span></code> parameter and expect it to contain
          a <a href="http://www.boost.org/doc/libs/release/libs/format/index.html" target="_top">Boost.Format</a>-compatible
          format string for our <code class="computeroutput"><span class="identifi