Does an object contain subnodes?

Description

Check to see if a 'phylo4d_ext' objects actually contains subnodes

Methods

signature(x = "list")

Apply this function to each object in the list

signature(x = "phylo")

Returns FALSE

signature(x = "phylo4")

Returns FALSE

signature(x = "phylo4d_ext")

Checks if subnode.data contains any columns

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