syntax_data: {"ast_node_type":"variable","tokens":[{"end":94,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let function_type = LLVMFunctionType(i64t, argts.as_mut_ptr(), argts.len() as u32, 0);
context_before:         let mut argts = [i64t, i64t, i64t];