/*::
declare type Block = any;
declare type BufArray = {
newblk(sz:number):Block;
next(sz:number):Block;
end():any;
push(buf:Block):void;
};
type RecordHopperCB = {(d:any, R:any, RT:number):?boolean;};
type EvertType = {[string]:string};
type EvertNumType = {[string]:number};
type EvertArrType = {[string]:Array<string>};
type StringConv = {(string):string};
type WriteObjStrFactory = {from_sheet(ws:Worksheet, o:any):string};
*/
