setUserData

sets user data for a row

row_id	string|number	the id of a row, if empty, user data is set for grid (not for a row)
name	string	the name of a user data block
value	mixed	the value of a user data block

Example

//set row userdata
mygrid.setUserData("unique_rowid","someName1","new value");
//set global userdata
mygrid.setUserData("","someName1","new value");

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