code: def operator_exists(operator_uri, enabled=True):
      """Checks if the given operator exists.
  
      Args:
          operator_uri: the operator URI
          enabled (True): whether to include only enabled operators (True) or
              only disabled operators (False) or all operators ("all")
  
      Returns:
          True/False
      """
      registry = OperatorRegistry(enabled=enabled)
      return registry.operator_exists(operator_uri)
  
file_path: fiftyone/fiftyone/operators/registry.py
imports: from .builtin import BUILTIN_OPERATORS
  import fiftyone.plugins.context
label_desc: Use image node_id 3 for calling a global function with example usage: operator_exists(operator_uri, enabled) and returns: registry