Queries regarding fetching of old iceberg schema and how to use iceberg-arrow apis

[Ayush]

Hi, I was trying to use apache iceberg to evolve my table schema and correspondingly add the new data to a parquet file. Now when I tried to revert back to a previous snapshot, I got the old data from the listed parquet files in that snapshot, but I was not able to retrieve the old schema. I was able to fetch the schema from the parquet file and convert it to iceberg schema. Is that the only way to fetch the old schema? Also are there any test cases or examples on how to use iceberg-arrow apis to read data from parquet file to arrow in batches?   Please do let me know regarding these queries.   Thanks, Ayush Bhardwaj