code: def is_pipeline_parameter_string(var: object) -> bool:
      """Check if the variable is a pipeline parameter string
  
      Args:
          var (object): The variable to be verified.
      Returns:
           bool: True if it is, False otherwise.
      """
      return isinstance(var, ParameterString)
  
imports: from __future__ import absolute_import
  from sagemaker.workflow.entities import Expression
  from sagemaker.workflow.parameters import ParameterString
label_desc: Use image node_id 2 for calling a global function with example usage: is_pipeline_parameter_string(var) and returns: isinstance