You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: builder.rs
    path of file: ./repos/termscp/src/explorer
    
    the code of the file until where you have to start completion: //! ## Builder
//!
//! `builder` is the module which provides a builder for Fil
    
    pub fn with_stack_size(&mut self, sz: usize) -> &mut FileExplorerBuilder {
        if let Some(e) = self.explorer.as_mut() {
            e.stack_size = sz;
            e.dirstack = VecDeque::with_capacity(sz);
        }
        self
    }