pub trait EnvelopeSummary {
// Required method
fn envelope_summary(
&self,
max_length: usize,
context: &FormatContextOpt<'_>,
) -> Result<String>;
}pub trait EnvelopeSummary {
// Required method
fn envelope_summary(
&self,
max_length: usize,
context: &FormatContextOpt<'_>,
) -> Result<String>;
}