DevExtreme dxSelectBox clear

HTML

<script src="http://cdnjs.cloudflare.com/ajax/libs/knockout/3.1.0/knockout-min.js"></script>
<script src="http://ajax.aspnetcdn.com/ajax/globalize/0.1.1/globalize.min.js"></script>
<script src="http://cdn3.devexpress.com/jslib/14.2.3/js/dx.phonejs.js"></script>
<link rel="stylesheet" href="http://cdn3.devexpress.com/jslib/14.2.3/css/dx.common.css">
<link rel="stylesheet" href="http://cdn3.devexpress.com/jslib/14.2.3/css/dx.ios.default.css">
"{"uuid":"98105e54-f1d2-424d-9266-073b21fcec68","certification":"NONE","productType":"ashish","productVersion":"1.0.0","dataSourceDriver":"MS SQL Server JDBC Driver 3.0","version":{"major":1,"minor":0,"revision":0},"defaultPort":8080,"scheme":"ashish","method":"SQL","instructions":"","defaultIntervalInMinutes":30,"driverName":"MSSQL","platformCompatible":"NA","updatedBy":"admin","updatedOn":"1534939088000","schemeDetail":{"name":"ashish","prettyName":"ashish","schemeType":"READ_ONLY","uuidScheme":"16515778-c785-49c8-a7f8-09686b0c01a7","certification":"NONE","version":{"major":1,"minor":0,"revision":0}},"parameters":[]}"

JavaScript

"{"
uuid ":"
98105e54 - f1d2 - 424 d - 9266 - 073 b21fcec68 ","
certification ":"
NONE ","
productType ":"
ashish ","
productVersion ":"
1.0 .0 ","
dataSourceDriver ":"
MS SQL Server JDBC Driver 3.0 ","
version ":{"
major ":1,"
minor ":0,"
revision ":0},"
defaultPort ":8080,"
scheme ":"
ashish ","
method ":"
SQL ","
instructions ":"
","
defaultIntervalInMinutes ":30,"
driverName ":"
MSSQL ","
platformCompatible ":"
NA ","
updatedBy ":"
admin ","
updatedOn ":"
1534939088000 ","
schemeDetail ":{"
name ":"
ashish ","
prettyName ":"
ashish ","
schemeType ":"
READ_ONLY ","
uuidScheme ":"
16515778 - c785 - 49 c8 - a7f8 - 09686 b0c01a7 ","
certification ":"
NONE ","
version ":{"
major ":1,"
minor ":0,"
revision ":0}},"
parameters ":[]}"