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Can some one help me edit this extension in Jason

Hi Gurus,

I need to select a variable for the default selection in this list box extension.Its a Jason file .When I am trying to edit the code snippet its not reflecting after I place the changed file in the extension folder.

The changed code is:


Defaulthighlight : {
ref : “Defaulthighlight”,
type : “boolean”,
label : “Always One Selected value”,
defaultValue : false
type: “string”,
expression : “always”,
expressionType : “dimension”,
ref: “Defaulthighlightvalue”,
translation: “Default Selected Value *”,

defaultValue: ” “,
show : function(data) {
return data.Defaulthighlight && !data.Defaulthighlight.qLibraryId;

I am editing the jason file in notepad but after that its not working.Can some one guide me whats the mistake I am making?