="tt372"><div class=CHook>called before series shadows are drawn.</div></div><div class=CToolTip id="tt373"><div class=CProperty><blockquote><table border=0 cellspacing=0 cellpadding=0 class=Prototype><tr><td>this.prefix = ''</td></tr></table></blockquote>String to prepend to the tick label. </div></div><div class=CToolTip id="tt374"><div class=CProperty><blockquote><table border=0 cellspacing=0 cellpadding=0 class=Prototype><tr><td>this.prefix = ''</td></tr></table></blockquote>String to prepend to the tic