code: function ClientSSLSecurityPFX(pfx, passphrase, defaults) {
    if (typeof passphrase === 'object') {
      defaults = passphrase;
    }
    if (pfx) {
      if (Buffer.isBuffer(pfx)) {
        this.pfx = pfx;
      } else if (typeof pfx === 'string') {
        this.pfx = fs.readFileSync(pfx);
      } else {
        throw new Error('supplied pfx file should be a buffer or a file location');
      }
    }
  
    if (passphrase) {
      if (typeof passphrase === 'string') {
        this.passphrase = passphrase;
      }
    }
    this.defaults = {};
    _.merge(this.defaults, defaults);
  }
docs: activates SSL for an already existing client using a PFX cert
  
  @module ClientSSLSecurityPFX
  @param {Buffer|String}   pfx
  @param {String}   passphrase
  @constructor