DropSchemaNode
interface DropSchemaNode  extends OperationNode {
readonly cascade?: boolean;
readonly ifExists?: boolean;
readonly kind: "DropSchemaNode";
readonly schema: IdentifierNode;
}const DropSchemaNode: Readonly<{
is(node: OperationNode): node is DropSchemaNode; 
create(schema: string, params?: DropSchemaNodeParams): DropSchemaNode; 
cloneWith(dropSchema: DropSchemaNode, params: DropSchemaNodeParams): DropSchemaNode; 
}>;