syntax_data: {"ast_node_type":"variable","tokens":[{"end":35,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:             let msg = match error {
context_before:         let alignment_error = |field_name: &str, error: AlignFromBytesError| -> String {
context_after:                 AlignFromBytesError::NotPowerOfTwo(_) => "not a power of 2 number of bytes",