code: function ( name, opts ) {
  
      if ( ! name ) {
        return cbk( new Error( "Geocoder.selectProvider requires a name.") );
      }
  
      this.provider = name;
      this.providerOpts = opts || {};
      this.providerObj = require("./providers/"+name);
  
    }
docs: Selects a webservice provider
  
  @param {String} name, required
  @param {Object} opts, optional
  @api public