code: def before(n: T.int32):
      A_data = T.allocate([n], "float32")
      T.evaluate(A_data)
  
imports: import tvm
  import tvm.testing
  from tvm.script import tir
  from tvm.tir.stmt_functor import substitute
label_desc: Use image node_id 1 for calling the TestSubstituteAllocate obj's underlying member method code with example usage: obj.before(n) without return types