altair.typing.ChannelFillOpacity

altair.typing.ChannelFillOpacity = str | altair.vegalite.v6.schema.channels.FillOpacity | altair.vegalite.v6.schema.channels.FillOpacityDatum | altair.vegalite.v6.schema.channels.FillOpacityValue | ForwardRef('IntoCondition') | collections.abc.Mapping[str, typing.Any]

Represent a union type

E.g. for int | str