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-rw-r--r--src/model/collapse.rs5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/model/collapse.rs b/src/model/collapse.rs
index 18cfae8b..17933fe8 100644
--- a/src/model/collapse.rs
+++ b/src/model/collapse.rs
@@ -29,6 +29,11 @@ impl<'a, T> CollapsingBuilder<'a, T> {
}
}
+ /// Whether the builder is empty.
+ pub fn is_empty(&self) -> bool {
+ self.builder.is_empty() && self.staged.is_empty()
+ }
+
/// Can only exist when there is at least one supportive item to its left
/// and to its right, with no destructive items or weak items in between to
/// its left and no destructive items in between to its right. There may be