public String getBlob() {
    return blob;
  }
The result of the eth_getBlobAndProofV2 JSON-RPC method contains an array of BlobAndProofV2.
BlobAndProofV2 contains the blob data and a list of kzg proof for the cells.
ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/results/BlobAndProofV2.java