pub fn content(mut self, content: impl Into<Option<String>>) -> Self {
        self.fields.content.replace(content.into());

        self
    }
/// Set the content of the message.
///
/// Pass `None` if you want to remove the message content.
Set the content of the message.
Pass `None` if you want to remove the message content.
Set the content of the message . Pass ` None ` if you want to remove the message content .
pub fn content(mut self, content: impl Into<Option<String>>) -> Self {
        self.fields.content.replace(content.into());
        self
    }
pub fn content ( mut self , content : impl Into < Option < String > > ) -> Self { self . fields . content . replace ( content . into ( ) ) ; self }
Set the content of the message.
Set the content of the message .
mut self
content
impl Into<Option<String>>
mut self
content
impl Into<Option<String>>