code: def leave_SchemaDefinition(self, node, *args):
      return join(
          [
              "schema",
              join(node.directives, " "),
              block(node.operation_types),
          ],
          " ",
      )
  
imports: import json
  from .visitor import Visitor, visit
label_desc: Use image node_id 24 for calling the PrintingVisitor obj's underlying member method code with example usage: obj.leave_SchemaDefinition(node) and returns: join