Bearings is Connections.Pivot.Hinge:
    .doc: """
    A Bearing connection specializes the simple Hinge connection
    to have two Mates instead of one, one for each bearing.

    This Bearing connection does not have the concept of an axle,
    instead each side both have a pearing pair,
    and they should both have the same separation.
    """
    with Connections.Pivot.Traits.Bearings

    left_mate is Physics3D.Interactions.Cylindrical:
        connectors: [from_bearings.left, to_bearings.left]
        enable_snap: false
    right_mate is Physics3D.Interactions.Cylindrical:
        connectors: [from_bearings.right, to_bearings.right]
        enable_snap: false
