pub unsafe extern "C" fn gmshModelMeshGetKeysForElement(
elementTag: usize,
functionSpaceType: *const c_char,
typeKeys: *mut *mut c_int,
typeKeys_n: *mut usize,
entityKeys: *mut *mut usize,
entityKeys_n: *mut usize,
coord: *mut *mut f64,
coord_n: *mut usize,
returnCoord: c_int,
ierr: *mut c_int,
)