((items :initform (make-array 0 :adjustable t :fill-pointer t) :reader store-items)
(columns-getters :initform (make-array 0 :adjustable t :fill-pointer t) :reader store-getters)
(columns-types :initform (make-array 0 :adjustable t :fill-pointer t) :reader store-types))
((items :initform (make-array 0 :adjustable t :fill-pointer t) :reader store-items)
(columns-getters :initform (make-array 0 :adjustable t :fill-pointer t) :reader store-getters)
(columns-types :initform (make-array 0 :adjustable t :fill-pointer t) :reader store-types))