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@@ -2,7 +2,7 @@
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* A function which can be used as a function parameter default which throws an error
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* if the parameter is undefined
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*
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- * @param {string} varname - name of the variable for the output
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+ * @param {string} [varname] - name of the variable for the output
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* @throws {Error}
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*/
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function isRequired (varname) {
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