tree.separation([separation]) If separation is specified, sets the separation accessor to the specified function

node.leaves() Returns the array of leaf nodes in traversal order; leaves are nodes with no children.

treemap.paddingBottom([padding]) If padding is specified, sets the bottom padding to the specified number or

treemap.paddingOuter([padding]) If padding is specified, sets the

pack.size([size]) If size is specified, sets this pack layout’s size to the specified two-element array of

cluster.nodeSize([size]) If size is specified, sets this cluster layout’s node size to the specified two-element

d3.packSiblings(circles) Packs the specified array of circles, each of which must have a circle.r property

d3.treemap() Creates a new treemap layout with default settings.

node.sort(compare) Sorts the children of this node, if any, and each of this node’s descendants’ children

cluster.size([size]) If size is specified, sets this cluster layout’s size to the specified two-element array