Verify Boxed fn new() implementation rendered correctly

[leigh-johnson]

• Built @asyncapi/modelina from: fix: rust impl new fn for Boxed values asyncapi/modelina#1013 (comment)

🤔 I'm still seeing 6 unexpected (and empty) anonymous schemas, but at least Rust and Typescript generators are producing the same behavior. I'll drop some debuggers; into the generator and see where these are coming from.

pub mod anonymous_schema1;
pub use self::anonymous_schema1::*;

pub mod anonymous_schema2;
pub use self::anonymous_schema2::*;

pub mod anonymous_schema3;
pub use self::anonymous_schema3::*;

pub mod anonymous_schema4;
pub use self::anonymous_schema4::*;

pub mod anonymous_schema5;
pub use self::anonymous_schema5::*;

pub mod anonymous_schema6;
pub use self::anonymous_schema6::*;

export type AnonymousSchema_1 = any;

export type AnonymousSchema_2 = any;

export type AnonymousSchema_3 = any;

export type AnonymousSchema_4 = any;

export type AnonymousSchema_5 = any;

export type AnonymousSchema_6 = any;