syntax_data: {"ast_node_type":"other","tokens":[{"end":52,"kind":"keyword","start":0,"text":"#[diag(session_apple_deployment_target_too_low)]"}]}
source_snippet:     #[diag(session_apple_deployment_target_too_low)]
context_before:     Invalid { env_var: &'static str, error: ParseIntError },
context_after:     TooLow { env_var: &'static str, version: String, os_min: String },