syntax_data: {"ast_node_type":"variable","tokens":[{"end":77,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let statement = &block_data.statements[from.statement_index];
context_before:                 let location = Location { block, statement_index: from.statement_index };
context_after:                 analysis.apply_primary_statement_effect(state, statement, location);