Function SCIPdialogExecWriteAllsolutions 

pub unsafe extern "C" fn SCIPdialogExecWriteAllsolutions(
    scip: *mut SCIP,
    dialog: *mut SCIP_DIALOG,
    dialoghdlr: *mut SCIP_DIALOGHDLR,
    nextdialog: *mut *mut SCIP_DIALOG,
) -> SCIP_RETCODE

execution method of dialog for writing all solutions