Suppose I am at a vertex of a suffix array created from a set of
strings. If I take one occurrence of the vertex I can access the local
and global positions via the posGlobalize() and posLocalize() functions.
The local position is the id of the suffix's sequence in the string set
and the position of the suffix in the string. The global position is an
int. What is the range of the global position? Does it range between 0
and N where N is the number of characters in the string set?