Difference between `Schema.NullishOr` and `Schema.optional` in Effect Typescript library

quick question. Whats the difference between

Schema.NullishOr

Schema.NullishOr

and

Schema.optional

Schema.optional

?

im

Schema.validate

Schema.validate

'ing a JSON response object from an undocumented http API and not sure what to use for fields that are sometimes missing

Difference between `Schema.NullishOr` and `Schema.optional` in Effect Typescript library - Effect Community