{ "\u0000": { "type": "string", "value": "null" }, "\\u0000": { "type": "string", "value": "different key" }, "\b \f A \u007f \u0080 \u00ff \ud7ff \ue000 \uffff \ud800\udc00 \udbff\udfff": { "type": "string", "value": "escaped key" }, "~ \u0080 \u00ff \ud7ff \ue000 \uffff \ud800\udc00 \udbff\udfff": { "type": "string", "value": "basic key" }, "l ~ \u0080 \u00ff \ud7ff \ue000 \uffff \ud800\udc00 \udbff\udfff": { "type": "string", "value": "literal key" } }