pub fn min_segment_history_index(&self) -> Option<i32> {
        self.segments
            .iter()
            .map(|s| s.segment_history().min_index())
            .min()
    }
/// Returns the minimum index in use by all the Segment Histories. `None` is
/// returned if the Run has no segments.
Returns the minimum index in use by all the Segment Histories. `None` is
returned if the Run has no segments.
Returns the minimum index in use by all the Segment Histories . ` None ` is returned if the Run has no segments .
pub fn min_segment_history_index(&self) -> Option<i32> {
        self.segments
            .iter()
            .map(|s| s.segment_history().min_index())
            .min()
    }
pub fn min_segment_history_index ( & self ) -> Option < i32 > { self . segments . iter ( ) . map ( | s | s . segment_history ( ) . min_index ( ) ) . min ( ) }
Returns the minimum index in use by all the Segment Histories.
Returns the minimum index in use by all the Segment Histories .
&self
&self