Extracting Key and Value Types from Schema.HashMap

export class Session extends Schema.Class<Session>("session/state/session")({
  data: Schema.HashMap({
    key: Schema.String,
    value: Schema.String
  }),
}) {}
export const SessionEntryKey = ? // Schema.String
export const SessionEntryValue = ? // Schema.String
export const SessionEntry = ? // [Schema.String, Schema.String]