Macro define_field_accessors 

macro_rules! define_field_accessors {
    ($field_name:ident, $add_method:ident, $get_method:ident) => { ... };
}

Macro to generate add/get accessor methods for a field collection.

This macro is designed to be used inside impl blocks and generates two methods:

• add_<add_method_name>() - adds a field to the collection (mutable)
• <get_method_name>() - gets the collection (immutable)

Both methods are marked with #[must_use] for the getter where appropriate.

Example

pub struct MyRecord {
    my_fields: Vec<Field>,
}

impl MyRecord {
    // Use the macro to generate add_my_field() and my_fields() methods
    define_field_accessors!(my_fields, add_my_field, my_fields);
}