GRAPH API MOTensor not working

Facing issues with graph API tutorial:
https://docs.modular.com/engine/graph
What is this MOTensor?
from max import graph

var m = graph.Module()

var g = m.graph(
    "my_model",
    in_types=MOTensor(DType.float32, 1, 28, 28, 1),
    out_types=MOTensor(DType.float32, 1, 10),
)

It's not available to me :/
 error: use of unknown declaration 'MOTensor'
    in_types= MOTensor(DType.float32, 1, 28, 28, 1)
Learn how to build a high-performance graph for MAX Engine.
Build a model with MAX Graph API | Modular Docs
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