N="
   "
   
   append() {
           local var="$1"
           local value="$2"
           local sep="${3:- }"
   
           eval "export -- \"$var=\${$var:+\${$var}\${value:+\$sep}}\$value\""
  }
  
  add_default_handler() {
          case "$(type $1 2>/dev/null)" in
                  *function*) return;;
                  *) eval "$1() { return; }"
          esac
  }
  
  set_default() {
          local __s_var="$1"
          local __s_val="$2"
          eval "export -- \"$__s_var=\${$__s_var:-\$__s_val}\""
  }
  
  _config_add_generic() {
          local type="$1"; shift
  
          for name in "$@"; do
                  json_add_array ""
                  json_add_string "" "$name"
                  json_add_int "" "$type"
                  json_close_array
          done
  }
  
  config_add_int() {
          _config_add_generic 5 "$@"
  }
  
  config_add_array() {
          _config_add_generic 1 "$@"
  }
  
  config_add_string() {
          _config_add_generic 3 "$@"
  }
  
  config_add_boolean() {
          _config_add_generic 7 "$@"
  }

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