s:

<TABLE STYLE="margin-left:2em" BORDER=0 CELLPADDING=2>
<TR>
    <TR>
        <TD VALIGN="top"><I>t</I></TD><TD WIDTH="2em" VALIGN="top">-</TD>
        <TD>An instance of T</TD>
    </TR>
    <TR>
        <TD VALIGN="top"><I>buffer_size</I></TD><TD WIDTH="2em" VALIGN="top">-</TD>
        <TD>The size of any buffers that need to be allocated</TD>
    </TR>
    <TR>
        <TD VALIGN="top"><I>pback_size</I></TD><TD WIDTH="2em" VALIGN="top">-</TD>
        <TD>The size of the putback buffer, relevant only i