[plt-scheme] Missing scheme_object_type

From: Khorev Sergey (Khorev at SoftLab.RU)
Date: Wed Nov 5 03:54:47 EST 2003

 From "Inside MzScheme":
The following are the Scheme_Type values for the standard types: 
* scheme_object_type -- SCHEME_OBJ_CLASS extracts the class, SCHEME_OBJ_DATA
extracts/sets the user pointer, and SCHEME_OBJ_FLAG extracts/sets the flag;
test for this type with SCHEME_OBJP

But there are NO such definitions in MzScheme source. Is this information

Sergey Khorev
You got the ball. You had it right there. Then ... you hit it away! And
 then ... you go and walk after it again! It's a dumb game!
 -- Bill Cosby

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