def constants_from_value(data=@value)
      data.scan(escape_pattern).flatten.collect { |value| value.strip }
    end
def constants_from_value(data=@value)
      data.scan(escape_pattern).flatten.collect { |value| value.strip }
    end
Look through the specified data for the escape pattern and return an array
 of those constants found. This defaults to the @value within step transformer
 as it is used internally, however, it can be called externally if it's
 needed somewhere.