SelectionNode
interface SelectionNode  extends OperationNode {
readonly kind: "SelectionNode";
readonly selection: SelectionNodeChild;
}const SelectionNode: Readonly<{
is(node: OperationNode): node is SelectionNode; 
create(selection: SelectionNodeChild): SelectionNode; 
createSelectAll(): SelectionNode; 
createSelectAllFromTable(table: TableNode): SelectionNode; 
}>;