This examples uses the cluster balloon layout "cluster#balloonTwoColumns".
This layout consists of two columns: a list of all geo objects, and information about the selected geo object.
The information about the selected geo object is set by a separate layout
and can be configured using the 'clusterBalloonItemContentLayout' option.
This example sets a custom layout with information about a geo object.
for objects can be created using the templateLayoutFactory factory and text templates.
Text templates generate the HTML content of the layout from the data hash passed to the layout constructor.
In this example, the data provider is the geo object selected in the left column.