Hierarchy : General parameters to build hierarchy for circular (sunburst) trees and bubbles graphs

# hierarchy
Hierarchy for trees and bubble graphs made up of sample annotations present the data x object
Type: array
Default: []
Used in: Bubble, Circular, Tree, Treemap

# hierarchyVar
Variable name to use in the sankey, sunburst and bubble graphs. This is used when the data set has more than a single variable. Otherwise the first variable will be selected
Type: string
Default:
Used in: Bubble, Circular, Tree, Treemap