setSoftphoneWidth() for Salesforce Classic

Sets the softphone width in pixels for the Salesforce console.

If this method is used in a Salesforce console where multi-monitor components is turned on, an error will be returned because resizing multi-monitor component is not allowed.

Name	Type	Description
`width`	number	Softphone width in pixels. The width should be a number that’s equal or greater than 0.
`callback`	function	JavaScript method executed when the API method call is completed.

This method is asynchronous. The response is returned in an object passed to a callback method. The response object contains the following fields.

Name	Type	Description
`result`	boolean	`true` if the width was set successfully, `false` if setting the width wasn’t successful.
`error`	string	If the API call was successful, this variable is undefined. If the API call failed, this variable returns an error message.