12 pub struct OpenOptions {  struct
13     tokio: TokioOpenOptions,  argument
16 impl OpenOptions {  implementation
40     pub fn read(&mut self, read: bool) -> &mut OpenOptions {  in read()  method
48     pub fn write(&mut self, write: bool) -> &mut OpenOptions {  in write()  method
56     pub fn append(&mut self, append: bool) -> &mut OpenOptions {  in append()  method
64     pub fn truncate(&mut self, truncate: bool) -> &mut OpenOptions {  in truncate()  method
72     pub fn create(&mut self, create: bool) -> &mut OpenOptions {  in create()  method
80     pub fn create_new(&mut self, create_new: bool) -> &mut OpenOptions {  in create_new()  method
99 impl OpenOptions {  impl
103     pub fn mode(&mut self, mode: u32) -> &mut OpenOptions {  in mode()  method
111     pub fn custom_flags(&mut self, flags: i32) -> &mut OpenOptions {  in custom_flags()
117 impl From<std::fs::OpenOptions> for OpenOptions {  implementation
123 impl From<TokioOpenOptions> for OpenOptions {  implementation