class_docstr: An object to assist in building Vega-Lite Expressions
class_docstr_tok: ["An","object","to","assist","in","building","Vega-Lite","Expressions"]
code: def __repr__(self):
      return "datum"
  
imports: from ..utils import SchemaBase
label_desc: Use image node_id 1 for calling the DatumType obj's underlying member method code with example usage: obj.__repr__() and returns: str