replace public with private; remove unused methods

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27710 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
replace public with private

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27711 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
GeoGebraCASIntegrationTest:

Added some test cases for two dimensional parametrics (#2910).

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27712 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Fix for #1544

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27713 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e