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function watch() {
local varName=$1
local var
eval var=\$$varName
[[ $# -ge 2 ]] && echo "$2 : ${var}" || echo "${varName} : ${var}"
}
function test() {
echo "test()"
local var a;
a=42
watch a
watch a "a currently has the value"
echo "~test()"
}
test
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