pub fn split_balanced(s: &str, split_character: char) -> Vec<&str> {
s.split(balanced(split_character))
.map(str::trim)
.collect::<Vec<_>>()
}
fn balanced(character_to_match: char) -> impl FnMut(char) -> bool {
let mut num_parens = 0;
move |c| match c {
'(' => {
num_parens += 1;
false
}
')' => {
num_parens -= 1;
false
}
other => num_parens == 0 && other == character_to_match,
}
}