```rust use orgize::{Org, ast::InlineCall}; let call = Org::parse("call_square[:results output](4)[:results html]").first_node:: ().unwrap(); assert_eq!(call.end_header().unwrap(), ":results html"); let call = Org::parse("call_square[:results output](4)").first_node:: ().unwrap(); assert!(call.end_header().is_none()); ```
(&self)