Function faiss_VectorTransform_train 

pub unsafe extern "C" fn faiss_VectorTransform_train(
    vt: *mut FaissVectorTransform,
    n: idx_t,
    x: *const f32,
) -> c_int

Perform training on a representative set of vectors

@param vt opaque pointer to VectorTransform object @param n nb of training vectors @param x training vectors, size n * d