How to check if an a variable is defined as an array in Bash

defined_as_array.sh

foo=" hi declare -a foo"
bar=(a b)

lint_var_defined_as_non_array() {
    if [[ "${!1+x}" == "" ]]; then
        return 1  # not defined
    fi
    if [[ "$(declare -p $1)" == "declare -a "* ]]; then
        return 1  # defined as an array
    fi
    return 0
}

lint_var_defined_as_array() {
    if [[ "${!1+x}" == "" ]]; then
        return 1  # not defined
    fi
    if [[ "$(declare -p $1)" == "declare -a "* ]]; then
        return 0  # defined as an array
    fi
    return 1
}

if lint_var_defined_as_non_array foo; then
  echo foo is non array
fi

if lint_var_defined_as_non_array bar; then
  echo bar is non array
fi

if lint_var_defined_as_non_array car; then
  echo car is non array
fi


if lint_var_defined_as_array foo; then
  echo foo is array
fi

if lint_var_defined_as_array bar; then
  echo bar is array
fi

if lint_var_defined_as_array car; then
  echo car is array
fi