code: def boolean_literal(self, tree):
      text = tree.children[0]
      if text == "TRUE":
          return ConstantValueExpression(True, ColumnType.BOOLEAN)
      return ConstantValueExpression(False, ColumnType.BOOLEAN)
  
imports: import numpy
  from lark import Tree
  from evadb.catalog.catalog_type import ColumnType
  from evadb.expression.abstract_expression import ExpressionType
  from evadb.expression.comparison_expression import ComparisonExpression
  from evadb.expression.constant_value_expression import ConstantValueExpression
  from evadb.expression.logical_expression import LogicalExpression
  from evadb.utils.generic_utils import string_comparison_case_insensitive
label_desc: Use image node_id 3 for calling the Expressions obj's underlying member method code with example usage: obj.boolean_literal(tree) and returns: ConstantValueExpression, ConstantValueExpression