Function fz_drop_context 

pub unsafe extern "C" fn fz_drop_context(ctx: *mut fz_context)

Free a context and its global state.

The context and all of its global state is freed, and any
buffered warnings are flushed (see fz_flush_warnings). If NULL
is passed in nothing will happen.

Must not be called for a context that is being used in an active
fz_try, fz_always or fz_catch block.