Parsing Schema to `undefined` on Failure in TypeScript

// Something like `getOrUndefined`
  Schema.Struct({
    "price": Schema.optional(Schema.NumberFromString).pipe(Schema.getOrUndefined), 
    "avg": Schema.optional(Schema.NumberFromString).pipe(Schema.getOrUndefined),
  })

// Something like `getOrUndefined`
  Schema.Struct({
    "price": Schema.optional(Schema.NumberFromString).pipe(Schema.getOrUndefined), 
    "avg": Schema.optional(Schema.NumberFromString).pipe(Schema.getOrUndefined),
  })