Custom Labels
The above example shows you how to create `Sankey` using built-in Google Charts.
For example:
...
"options" => array(
"sankey" => array(
"node" => array("label" => array(
"fontName" => 'Times-Roman',
"fontSize" => 14,
"color" => '#871b47',
"bold" => true,
"italic" => true
))
)
)