p>This class is extended to define structs.</p>
<p>Fields in a struct, annotated with a subtype of <a href="../dart-ffi/NativeType-class.html">NativeType</a>, are
automatically transformed into wrappers to access the fields of the struct
in native memory.</p>
<p>All fields in a struct must either have a type which extends <a href="../dart-ffi/NativeType-class.html">NativeType</a> or
else have an annotation indicating the corresponding native type (e.g.
"@Int32()" for "int").</p>
<p>Instances of a subclass o