syntax_data: {"ast_node_type":"variable","tokens":[{"end":43,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let mut argts = [i64t, i64t, i64t];
context_before:         let i64t = LLVMInt64TypeInContext(context);
context_after:         let function_type = LLVMFunctionType(i64t, argts.as_mut_ptr(), argts.len() as u32, 0);