code: function typeToString(allowedType){
  		if( allowedType === Number )	return 'Number'
  		if( allowedType === String )	return 'String'
  		if( allowedType === Object )	return 'Object'
  		if( allowedType === undefined )	return 'undefined'
  		return allowedType.toString()
  	}
docs: convert one allowed type to a string
  
  @param  {any} allowedType - the allowed type
  @return {String}          - the string for this type