index.js
function throwIf (target /*, illegal... */) {
    Array.prototype.slice.call(arguments, 1).forEach(function (name) {
      if (options[name]) {
        throw new Error('Cannot set ' + name + ' and ' + target + 'together');
      }
    });
  }
function throwIf (target /*, illegal... */) {
    Array.prototype.slice.call(arguments, 1).forEach(function (name) {
      if (options[name]) {
        throw new Error('Cannot set ' + name + ' and ' + target + 'together');
      }
    });
  }
function throwIf ( target /*, illegal... */ ) { Array . prototype . slice . call ( arguments , 1 ) . forEach ( function ( name ) { if ( options [ name ] ) { throw new Error ( 'Cannot set ' + name + ' and ' + target + 'together' ) ; } } ) ; }
Helper function which throws an `Error` in the event that any of the rest of the arguments is present in `options`.
Helper function which throws an Error in the event that any of the rest of the arguments is present in options .