#### 2.6Pict Finders

(lt-find pict find)
 real? real?
pict : pict?
find : pict-path?
(ltl-find pict find)
 real? real?
pict : pict?
find : pict-path?
(lc-find pict find)
 real? real?
pict : pict?
find : pict-path?
(lbl-find pict find)
 real? real?
pict : pict?
find : pict-path?
(lb-find pict find)
 real? real?
pict : pict?
find : pict-path?
(ct-find pict find)
 real? real?
pict : pict?
find : pict-path?
(ctl-find pict find)
 real? real?
pict : pict?
find : pict-path?
(cc-find pict find)
 real? real?
pict : pict?
find : pict-path?
(cbl-find pict find)
 real? real?
pict : pict?
find : pict-path?
(cb-find pict find)
 real? real?
pict : pict?
find : pict-path?
(rt-find pict find)
 real? real?
pict : pict?
find : pict-path?
(rtl-find pict find)
 real? real?
pict : pict?
find : pict-path?
(rc-find pict find)
 real? real?
pict : pict?
find : pict-path?
(rbl-find pict find)
 real? real?
pict : pict?
find : pict-path?
(rb-find pict find)
 real? real?
pict : pict?
find : pict-path?
Locates a pict designated by find is within pict. If find is a pict, then the pict must have been created as some combination involving find.

If find is a list, then the first element of find must be within pict, the second element of find must be within the second element, and so on.

 (pict-path? v) → boolean? v : any/c
Returns #t if v is a pict or a non-empty list of picts.

 (launder pict) → pict? pict : pict?
Creates a pict that has the same drawing and bounding box of pict, but which hides all of its sub-picts so that they cannot be found with functions like lt-find. If pict has a last-line pict, then the laundered pict has a fresh last-line pict with the same shape and location.