class_docstr: Represents a placeholder for result of concatenation of multiple parts.
  
  Represents a placeholder that will be replaced at runtime with a single string
  containing the concatenated parts.
class_docstr_tok: ["Represents","a","placeholder","for","result","of","concatenation","of","multiple","parts",".","Represents","a","placeholder","that","will","be","replaced","at","runtime","with","a","single","string","containing","the","concatenated","parts","."]
code: def __init__(self, items: List["CommandlineArgumentType"]):
      self.items = items
  
imports: from typing import List, Union
  from tfx.utils import json_utils
label_desc: Use image node_id 1 to create a new ConcatPlaceholder object  with example: obj = ConcatPlaceholder(items)