class_docstr: Base class for all Statements
  
  Attributes
  ----------
  stmt_type : StatementType
      the type of this statement - Select or Insert etc
code: def stmt_type(self):
      return self._stmt_type
  
imports: from copy import deepcopy
  from evadb.parser.types import StatementType
label_desc: Use image node_id 2 for calling the AbstractStatement obj's underlying member method code with example usage: obj.stmt_type() and returns: self