Method extend

datafusion/common/src/metadata.rs:293–299

Adds metadata from `other` into `self`, overwriting any existing keys.

(&mut self, other: Self)

    /// Adds metadata from `other` into `self`, overwriting any existing keys.
    pub fn extend(&mut self, other: Self) {
        if other.is_empty() {
            return;
        }
        let other = Arc::unwrap_or_clone(other.into_inner());
        Arc::make_mut(&mut self.inner).extend(other);
    }

    /// Returns true if the metadata is empty.
    pub fn is_empty(&self) -> bool {