:MetalPanel::VALID_COLORS (constant)">VALID_COLORS</a></span></span><span class='period'>.</span><span class='id identifier rubyid_include?'>include?</span><span class='lparen'>(</span><span class='id identifier rubyid_color'>color</span><span class='rparen'>)</span> <span class='op'>?</span> <span class='id identifier rubyid_color'>color</span> <span class='op'>:</span> <span class='symbol'>:blue</span>

  <span class='ivar'>@upper_edge_panel</span><span class='period'>.</span><span class='id identifier ru