Writes out the given local info
The written string will be something like:
"localVar":Ljava/lang/String;, "SomeSignature"
"localVar":Ljava/lang/String;
"localVar":V, "SomeSignature"
null:Ljava/lang/String;, "SomeSignature"
null:V, "SomeSignature"
One of name, type or signature must be non-null