def METHOD_NAME(labware_uri: str) -> "LabwareDefinition":
    """
    Return the custom tiprack definition saved in the custom tiprack directory
    during tip length calibration
    """
    custom_tiprack_dir = config.get_custom_tiprack_def_path()
    custom_tiprack_path = custom_tiprack_dir / f"{labware_uri}.json"
    try:
        with open(custom_tiprack_path, "rb") as f:
            return typing.cast(
                "LabwareDefinition",
                json.loads(f.read().decode("utf-8")),
            )
    except FileNotFoundError:
        raise FileNotFoundError(
            f"Custom tiprack {labware_uri} not found in the custom tiprack"
            "directory on the robot. Please recalibrate tip length and "
            "pipette offset with this tiprack before performing calibration "
            "health check."
        )