The token string of the subtree at from (the whole file for from = 0), one token per node. The token of a node includes its number of children, so the string determines the shape of the subtree.
from
from = 0
The token string of the subtree at
from(the whole file forfrom = 0), one token per node. The token of a node includes its number of children, so the string determines the shape of the subtree.