Move the so far framework-internal headers layoutmanager.hxx and the uielement.hxx one that it includes to the top-level include/ directory and mark LayoutManager as FWK_DLLPUBLIC. This is to prepare for a new version of Heiko's [1] that doesn't require UNO API changes, but can use the LayoutManager class directly. [1] https://gerrit.libreoffice.org/c/core/+/195836/9 Change-Id: I7439274c29814ef23c6fde11770e1519e54bc0b2 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/197338 Reviewed-by: Heiko Tietze <heiko.tietze@documentfoundation.org> Tested-by: Jenkins