text: 
  from proc.expression.expression import Expression
  from proc.environment import Environment
  from proc.value.expressed_value import ExpressedValue
  
  
  class ProgramExpression(Expression):
  
      def __init__(self, body: Expression):
          self.body = body
  
      def string_representation(self):
          return "body = {0}".format(self.body)
  
      def evaluate(self, environment: Environment) -> ExpressedValue:
          return self.body.evaluate(environment)
  