Non-null Associative Array Not Considered as Set.bash

#!/usr/bin/env bash
#shellcheck disable=SC2034
# Comments prefixed by BASHDOC: are hints to specific GNU Bash Manual's section:
# https://www.gnu.org/software/bash/manual/

## Makes debuggers' life easier - Unofficial Bash Strict Mode
## http://redsymbol.net/articles/unofficial-bash-strict-mode/
## BASHDOC: Shell Builtin Commands - Modifying Shell Behavior - The Set Builtin
### Exit prematurely if a command's return value is not 0(with some exceptions), triggers ERR trap if available.
set -o errexit

### Trap on `ERR' is inherited by shell functions, command substitutions, and subshell environment as well
set -o errtrace

### Exit prematurely if an unset variable is expanded, causing parameter expansion failure.
set -o nounset

### Let the return value of a pipeline be the value of the last (rightmost) command to exit with a non-zero status
set -o pipefail

## Non-overridable Primitive Variables
##
## BashFAQ/How do I determine the location of my script? I want to read some config files from the same place. - Greg's Wiki
## http://mywiki.wooledge.org/BashFAQ/028
RUNTIME_EXECUTABLE_FILENAME="$(basename "${BASH_SOURCE[0]}")"
declare -r RUNTIME_EXECUTABLE_FILENAME
declare -r RUNTIME_EXECUTABLE_NAME="${RUNTIME_EXECUTABLE_FILENAME%.*}"
RUNTIME_EXECUTABLE_DIRECTORY="$(dirname "$(realpath --strip "${0}")")"
declare -r RUNTIME_EXECUTABLE_DIRECTORY
declare -r RUNTIME_EXECUTABLE_PATH_ABSOLUTE="${RUNTIME_EXECUTABLE_DIRECTORY}/${RUNTIME_EXECUTABLE_FILENAME}"
declare -r RUNTIME_EXECUTABLE_PATH_RELATIVE="${0}"
declare -r RUNTIME_COMMAND_BASE="${RUNTIME_COMMAND_BASE:-${0}}"

### These are the dependencies that are used later and also checked later
declare -ar global_indexed_array=(1 2 3)
declare -Ar global_associative_array=(\
	["apple"]="1" \
	["banana"]="2" \
)

trap_errexit(){
	printf "An error occurred and the script is prematurely aborted\n" 1>&2
	return 0
}; declare -fr trap_errexit; trap trap_errexit ERR

trap_exit(){
	return 0
}; declare -fr trap_exit; trap trap_exit EXIT

is_set(){
	declare -n array_nameref="${1}"

	if [ ! -v array_nameref ]; then
		return 1
	else
		return 0
	fi
}

## init function: program entrypoint
init(){
	for parameter in global_associative_array global_indexed_array; do
		# Case: check in function
		if is_set "${parameter}"; then
			printf "%s is set\n" "${parameter}"
		else
			printf "%s is NOT set\n" "${parameter}"
		fi

		# Case: check inline
		declare -n array_nameref="${parameter}"

		if [ ! -v array_nameref ]; then
			printf "%s is NOT set\n" "${parameter}"
		else
			printf "%s is set\n" "${parameter}"
		fi

		unset -n array_nameref
	done
	# exit 0
}; declare -fr init
init "${@}"