fn only_single_node_children(&self) -> bool {
        self.0
            .iter()
            .map(ToNodeIterator::to_node_iterator_stream)
            .all(|s| s.is_none())
    }
// Check if each child represents a single node.
// This is the case when no expressions are used.
Check if each child represents a single node.
This is the case when no expressions are used.
Check if each child represents a single node . This is the case when no expressions are used .
fn only_single_node_children(&self) -> bool {
        self.0
            .iter()
            .map(ToNodeIterator::to_node_iterator_stream)
            .all(|s| s.is_none())
    }
fn only_single_node_children ( & self ) -> bool { self . 0 . iter ( ) . map ( ToNodeIterator :: to_node_iterator_stream ) . all ( | s | s . is_none ( ) ) }
Check if each child represents a single node.
Check if each child represents a single node .
&self
&self