TerrainLayer Mask Map channel order?

Hi there Unity people
There is a discrepancy in the the details of the TerrainLayer Mask Map channels

in the Manual it says

For the HDRP and URP TerrainLit Shader, the RGBA channels of the Mask Map Texture correspond to: 

R Metallic

G Ambient Occlusion

B Height

A Smoothness (Diffuse Alpha becomes Density)

and in the API it says

The content of each channel varies by the terrain shader. For HDRP TerrainLit shader, the channels are:

R: Height - used when doing height based blending

G: Smoothness

B: Metallic.

can someone please tell me witch one is the correct channel order?