drscheme:get/extend:extend-tab in DrScheme Tools Functions

• (drscheme:get/extend:extend-tab mixin) -> void?
     mixin : (make-mixin-contract drscheme:unit:tab%)

  
  

• (drscheme:get/extend:extend-tab mixin before?) -> void?
     mixin : (make-mixin-contract drscheme:unit:tab%)
     before? : boolean?

  This class implements the tabs in drscheme. One is created for each tab in a frame (each frame always has at least one tab, even if the tab bar is not shown)

  The argument, before, controls if the mixin is applied before or after already installed mixins. If unsupplied, this is the same as supplying #t.