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#[inline] pub fn view_id(parent_id: &str, child_key: Option<&String>, index: usize) -> String { let child_view_id = child_view_id(child_key, index); let mut string = String::with_capacity(parent_id.len() + child_view_id.len() + 1); string.push_str(parent_id); string.push('.'); string.push_str(&child_view_id); string } #[inline] pub fn child_view_id(child_key: Option<&String>, index: usize) -> String { match child_key { None => index.to_string(), Some(key) => key.clone(), } }