how to do ajax call to covert to textfield instead of "convertToMultiSelect" in jira behavior script

[rakesh rocckz]

i have script which converts the customfield to multiselect field by using below method

nt

getfieldByID('customfield').convertToMultiSelect([

ajaxOptions: [ 

url: getMyUrl() + "/rest/endpoint/myurl/"

formatResponse: "general",

]

]))

how would i make the "convertToMultiSelect" option to textfield ??? please help me out. i just want to show  whatever the response comesback instead of converting it into multiselect??