RData             407 gc.c           	struct RData   data;
RData            1223 include/ruby/ruby.h #define RDATA(obj)   (R_CAST(RData)(obj))
RData            1368 include/ruby/ruby.h     return ((struct RData *)obj)->data;
RData            2199 ruby.c             return (void*)(struct RData*)iseq;