Object which contains information about the chart segment. It has the following properties:
columns– Array of objects. Column tuple. Each object contains information about the hierarchy members from columns associated with this chart segment.
element– Object. The HTML DOM element of the segment.
id– String. The id of the segment.
label– String. The label of the segment.
measure– Object. Measure associated with the segment.
rows– Array of objects. Row tuple. Each object contains information about the hierarchy members from rows associated with this chart segment.
value– Number. The value of the segment.