text: """
  Store operators.
  """
  from pyte import tokens, util
  from pyte.exc import CompileError, ValidationError
  from pyte.superclasses import _PyteAugmentedValidator, _PyteOp
  
  
  class STORE_FAST(_PyteOp):
      """
      Represents a STORE_FAST operation.
      """
  
      def to_bytes(self, previous):
          # Check the first arg.
          try:
              arg = self.args[0]
          except IndexError:
              raise CompileError("No varname was passed to store in.") from None
  
          try:
              assert isinstance(arg, _PyteAugmentedValidator)
          except AssertionError:
              raise ValidationError("Passed in varname was not validated")
  
          # Validate the arg.
          arg.validate()
          # Generate a STORE_FAST opcode
          opp = util.generate_simple_call(tokens.STORE_FAST, arg.index)
          return opp