tests/required_strings.fbs

namespace required_strings;

/**
 * Foo defines a type where both fields are mandatory.
 * The creation of a Foo buffer must throw if either of the fields is missing.
 *
 * https://github.com/google/flatbuffers/issues/7739
 */
table Foo {
  str_a:string (required);
  str_b:string (required);
}