Method contains

datafusion/common/src/extensions.rs:129–131

Returns true if an extension of type `T` is set.

(&self)

    /// Returns true if an extension of type `T` is set.
    pub fn contains<T: Any + Send + Sync>(&self) -> bool {
        self.inner.contains_key(&TypeId::of::<T>())
    }

    /// Merge entries from `other` into `self`. Entries in `other` take
    /// precedence over existing entries with the same type.