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/** * Determine the proxy settings configured by npm * * It's possible to configure npm to use a proxy different * from the system defined proxy. This can be done via the * `npm config` CLI or the `.npmrc` config file. * * If a proxy has been configured in this way we must * tell request explicitly to use it. * * Otherwise we can trust request to the right thing. * * @return {String} the proxy configured by npm or an empty string * @api private */module.exports = function() {  return process.env.npm_config_https_proxy ||    process.env.npm_config_proxy ||    process.env.npm_config_http_proxy ||    '';};
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