Return the node ids of all tips that descend from node.
Examples
tree <- randTree(10)
# everyone descends from root
getNdKids(tree, id = tree["root"])
#>  [1] "t1"  "t2"  "t3"  "t4"  "t5"  "t6"  "t7"  "t8"  "t9"  "t10"
Return the node ids of all tips that descend from node.
tree <- randTree(10)
# everyone descends from root
getNdKids(tree, id = tree["root"])
#>  [1] "t1"  "t2"  "t3"  "t4"  "t5"  "t6"  "t7"  "t8"  "t9"  "t10"