Method keys

modules/llrt_fetch/src/headers.rs:273–278

(
        this: This<Class<'js, Headers>>,
        ctx: Ctx<'js>,
    )

    }

    pub fn keys<'js>(
        this: This<Class<'js, Headers>>,
        ctx: Ctx<'js>,
    ) -> Result<Class<'js, HeadersIter<'js>>> {
        HeadersIter::new(&ctx, this.0, IterKind::Keys)
    }

    pub fn values<'js>(
        this: This<Class<'js, Headers>>,