add rustdoc

parquet/src/bloom_filter/mod.rs

@@ -131,6 +131,7 @@ impl Sbbf {
         Self(data)
     }
 
+    /// Write the bitset in serialized form to the writer.
     pub fn write_bitset<W: Write>(&self, mut writer: W) -> Result<(), ParquetError> {
         for block in &self.0 {
             for word in block {
@@ -145,6 +146,7 @@ impl Sbbf {
         Ok(())
     }
 
+    /// Create and populate [`BloomFilterHeader`] from this bitset for writing to serialized form
     pub fn header(&self) -> BloomFilterHeader {
         BloomFilterHeader {
             // 8 i32 per block, 4 bytes per i32
@@ -155,6 +157,7 @@ impl Sbbf {
         }
     }
 
+    /// Read a new bloom filter from the given offset in the given reader.
     pub fn read_from_column_chunk<R: ChunkReader>(
         column_metadata: &ColumnChunkMetaData,
         reader: Arc<R>,