8 #ifndef BOOST_GIL_CONCEPTS_HPP     9 #define BOOST_GIL_CONCEPTS_HPP    13 #include <boost/gil/concepts/channel.hpp>    14 #include <boost/gil/concepts/color.hpp>    15 #include <boost/gil/concepts/color_base.hpp>    16 #include <boost/gil/concepts/concept_check.hpp>    17 #include <boost/gil/concepts/image.hpp>    18 #include <boost/gil/concepts/image_view.hpp>    19 #include <boost/gil/concepts/pixel.hpp>    20 #include <boost/gil/concepts/pixel_based.hpp>    21 #include <boost/gil/concepts/pixel_dereference.hpp>    22 #include <boost/gil/concepts/pixel_iterator.hpp>    23 #include <boost/gil/concepts/pixel_locator.hpp>    24 #include <boost/gil/concepts/point.hpp>