Function radius_search_spatial_tensor_parallel 

pub fn radius_search_spatial_tensor_parallel<I: ChunkedRadiusSearchIndex + Sync>(
    index: &I,
    x: &[f32],
    y: &[f32],
    z: &[f32],
    tensor: &SpatialTensor<'_>,
    radius: f32,
) -> Vec<(usize, Neighbor)>

Parallel radius search over SpatialTensor chunks.