pub fn choose_anchor_segment(
root_segment: &ErasedSegment,
edit_type: EditType,
segment: &ErasedSegment,
filter_meta: bool,
) -> ErasedSegment
pub fn choose_anchor_segment(
root_segment: &ErasedSegment,
edit_type: EditType,
segment: &ErasedSegment,
filter_meta: bool,
) -> ErasedSegment