syntax_data: {"ast_node_type":"variable","tokens":[{"end":58,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let col_hi_trunc = (col_hi.0 as u64) & 0xFF << 32;
context_before:         let line_lo_trunc = ((line_lo as u64) & 0xFF_FF_FF) << 8;
context_after:         let line_hi_trunc = ((line_hi as u64) & 0xFF_FF_FF) << 40;