Suggestion: input box for deobfuscating from one mapping to another

[mrbuilder1961]

for example, if it's set to translate Yarn 1.20.4 to Mojang (Intermediary) and I input:

java.lang.NullPointerException: Cannot invoke "net.minecraft.class_2561.getString()" because the return value of "net.minecraft.class_2568.method_10891(net.minecraft.class_2568$class_5247)" is null

it would output:

java.lang.NullPointerException: Cannot invoke "net.minecraft.text.Text.getString()" because the return value of "net.minecraft.text.HoverEvent.getValue(net.minecraft.HoverEvent$Action)" is null

it's very helpful for, as used in the example, logs. it would be cool!