visualParseTree function
This method prints a visual of the AST.
Implementation
void visualParseTree(List<dynamic> parseTree) {
String spaces = ' ';
print('\n');
print('root');
for (int i = 0; i < parseTree.length; i++) {
print('$spaces|');
print('$spaces|');
print('$spaces|- ${parseTree[i][0]}');
print('$spaces| -');
for (int z = 1; z < parseTree[i].length; z++) {
print('$spaces| |');
print('$spaces| -${parseTree[i][z]}');
}
}
print('\n');
}