code: function getName(key) {
    if(key == '_') return key;
    if(this.conf.transform) {
      if(typeof(this.conf.transform.name) == 'function') {
        return this.conf.transform.name.call(this, key);
      }
    }
    if(this.conf.prefix) {
      key = key.replace(this.conf.prefix + '_', '');
    }
    // guard against silly variables such as npm_config_cache____foo
    key = key.replace(
      new RegExp(this.conf.delimiter + '+', 'g'), this.conf.delimiter);
  
    return camelcase(key, this.conf.delimiter)
  }
docs: Convert a key into a property name.
  
  @param key The property key.
  
  @return A camel case property name.