prefixItems property

The schema for the initial items in this list, if specified.

For example, to define a schema for a list where the first item must be a string and the second item must be an integer:

final schema = ListSchema(
  prefixItems: [Schema.string(), Schema.int()],
);

In this schema, a list like ['hello', 42] would be valid, but [42, 'hello'] or ['hello'] would be invalid because they do not conform to the specified order and types of the prefix items.

Note that if you want to allow additional items in the list that do not match the prefix items, you can use the items property to define a schema for those additional items. For example, to allow any number of additional strings after the initial string and integer:

final schema = ListSchema(
  prefixItems: [Schema.string(), Schema.int()],
  items: Schema.string()
);