Question: How to input "exprseq" type in Maplet?

im trying to input this variable with value structure

> xxx := x[2, 0], x[2, 1], x[2, 2], x[1, 0], x[1, 1]

check the type

> whattype(xxx);

but when i try to use Get tools from maplets package, its give me error

> xxx:=Get`('xxx1'::exprseq)
invalid argument(s): xxx1::exprseq

is it possible to passing exprseq from maplet input into procedure?
or is there another way to input it (xxx) ?

You are please to check maple file:

case close, many thanks @tomleslie and @vv

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