Function used to sales order search for get the context value

function transactionSearch(orderID){
    try{
        var transactionSearchObj = search.create( {
            type: "salesorder",
            filters:
                [
                    ["type","anyof","SalesOrd"],
                     "AND",
                     ["systemnotes.context","anyof","WST"],
                     "AND",
                     ["internalid","anyof",orderID],
                    "AND",
                    [ "mainline", "is", "T" ]
                ],
            columns:
                [
                    search.createColumn({
                        name: "context",
                        join: "systemNotes",
                        label: "Context"
                    })
                ]
        } );
        var searchResultCount = transactionSearchObj.runPaged().count;
        log.debug( "transactionSearchObj result count", searchResultCount );
        transactionSearchObj.run().each( function ( result )
        {
            contextValue = result.getValue( transactionSearchObj.columns[ 0 ] )
            return true;
        } );
        return contextValue;

    }catch (e) {

    }
}