Expect column values to be decreasing.

        By default, this expectation only works for numeric or datetime data.
        When `parse_strings_as_datetimes=True`, it can also parse strings to datetimes.

        If `strictly=True`, then this expectation is only satisfied if each consecutive value
        is strictly decreasing--equal values are treated as failures.

        expect_column_values_to_be_decreasing is a :func:`column_map_expectation <great_expectations.data_asset.dataset.Dataset.column_map_expectation>`.

        Args:
            column (str): \
                The column name.

        Keyword Args:
            strictly (Boolean or None): \
                If True, values must be strictly greater than previous values
            parse_strings_as_datetimes (boolean or None) : \
                If True, all non-null column values to datetimes before making comparisons
            mostly (None or a float between 0 and 1): \
                Return `"success": True` if at least mostly percent of values match the expectation. \
                For more detail, see :ref:`mostly`.

        Other Parameters:
            result_format (str or None): \
                Which output mode to use: `BOOLEAN_ONLY`, `BASIC`, `COMPLETE`, or `SUMMARY`.
                For more detail, see :ref:`result_format <result_format>`.
            include_config (boolean): \
                If True, then include the expectation config as part of the result object. \
                For more detail, see :ref:`include_config`.
            catch_exceptions (boolean or None): \
                If True, then catch exceptions and include them as part of the result object. \
                For more detail, see :ref:`catch_exceptions`.
            meta (dict or None): \
                A JSON-serializable dictionary (nesting allowed) that will be included in the output without modification. \
                For more detail, see :ref:`meta`.

        Returns:
            A JSON-serializable expectation result object.

            Exact fields vary depending on the values passed to :ref:`result_format <result_format>` and
            :ref:`include_config`, :ref:`catch_exceptions`, and :ref:`meta`.

        See Also:
            expect_column_values_to_be_increasing

def expect_column_values_to_be_decreasing(self,
                                              column,
                                              strictly=None,
                                              parse_strings_as_datetimes=None,
                                              mostly=None,
                                              result_format=None, include_config=False, catch_exceptions=None, meta=None
                                              ):
        """Expect column values to be decreasing.

        By default, this expectation only works for numeric or datetime data.
        When `parse_strings_as_datetimes=True`, it can also parse strings to datetimes.

        If `strictly=True`, then this expectation is only satisfied if each consecutive value
        is strictly decreasing--equal values are treated as failures.

        expect_column_values_to_be_decreasing is a :func:`column_map_expectation <great_expectations.data_asset.dataset.Dataset.column_map_expectation>`.

        Args:
            column (str): \
                The column name.

        Keyword Args:
            strictly (Boolean or None): \
                If True, values must be strictly greater than previous values
            parse_strings_as_datetimes (boolean or None) : \
                If True, all non-null column values to datetimes before making comparisons
            mostly (None or a float between 0 and 1): \
                Return `"success": True` if at least mostly percent of values match the expectation. \
                For more detail, see :ref:`mostly`.

        Other Parameters:
            result_format (str or None): \
                Which output mode to use: `BOOLEAN_ONLY`, `BASIC`, `COMPLETE`, or `SUMMARY`.
                For more detail, see :ref:`result_format <result_format>`.
            include_config (boolean): \
                If True, then include the expectation config as part of the result object. \
                For more detail, see :ref:`include_config`.
            catch_exceptions (boolean or None): \
                If True, then catch exceptions and include them as part of the result object. \
                For more detail, see :ref:`catch_exceptions`.
            meta (dict or None): \
                A JSON-serializable dictionary (nesting allowed) that will be included in the output without modification. \
                For more detail, see :ref:`meta`.

        Returns:
            A JSON-serializable expectation result object.

            Exact fields vary depending on the values passed to :ref:`result_format <result_format>` and
            :ref:`include_config`, :ref:`catch_exceptions`, and :ref:`meta`.

        See Also:
            expect_column_values_to_be_increasing

        """
        raise NotImplementedError