How to define a custom GufeQuantity

gufe.settings.typing.GufeQuantity is compatible with both pydantic serialization and openff.

See gufe.settings.typing for quantities included in gufe.

To make your own:

from gufe.settings.typing import GufeQuantity, specify_quantity_units
RadiansQuantity:TypeAlias = Annotated[GufeQuantity, specify_quantity_units("radians")]

or for an array:

from gufe.settings.typing import GufeArrayQuantity, specify_quantity_units

RadiansArrayQuantity: TypeAlias = Annotated[
    GufeArrayQuantity,
    specify_quantity_units("radians"),
]