Method add

src/request/openai.rs:85–90

(&mut self, other: &TokenUsage)

    }
    
    pub fn add(&mut self, other: &TokenUsage) {
        self.prompt_tokens += other.prompt_tokens;
        self.completion_tokens += other.completion_tokens;
        self.total_tokens += other.total_tokens;
        self.cached_tokens += other.cached_tokens;
    }
}

pub struct OpenAIHanler {