debugJsonPos = function(e) {
					if(e.message.includes("at position ")) {
						const posIdx = Number(e.message.match(/at position (\d+)/)[1]);
						console.debug(e.message + " of [" + language + "/" + filename + ".json]: ["
							+ jsonText.substring(posIdx - 1, posIdx + 2) + "] at [" + jsonText.substring(posIdx - 32, posIdx + 32) + "]");
					}
				}
Clear specified attribute key from specified JSON object.