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module.exports = function (opts) {
opts = opts || {};
var configName = opts.configName;
var extensions = opts.extensions;
if (!configName) {
throw new Error('Please specify a configName.');
}
if (configName instanceof RegExp) {
return [configName];
}
if (!Array.isArray(extensions)) {
throw new Error('Please provide an array of valid extensions.');
}
return extensions.map(function (ext) {
return configName + ext;
});
};
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