Dhtmlx scheduler : refresh Timeline view sections or create another view

hi
I got the answer

on load
==========
scheduler.createTimelineView({
name: "timeline",
x_unit: "hour",
x_date: "%h:%A",
x_step: 3,
x_size: 24,
x_start: 0,
x_length: 24,
dy: 20,
section_autoheight: false,
///y_unit: sections,
y_unit: scheduler.serverList("MyList", sections),
y_property: "section_id",
render: "tree"
,second_scale: {
x_unit: "day", // unit which should be used for second scale
x_date: "%M %d %D" // date format which should be used for second scale, "July 01"
}
});


on channge
==========
scheduler.updateCollection("MyList", sections);