velox/vector/DecodedVector.h
const vector_size_t* nullIndices() {
    if (hasExtraNulls_) {
      return nullptr;
    }
    return indices_;
  }
/// Returns the mapping from top-level rows to entries in nulls() buffer.
/// Returns nullptr if mapping is identity.
Returns the mapping from top-level rows to entries in nulls() buffer.
Returns nullptr if mapping is identity.
Returns the mapping from top - level rows to entries in nulls () buffer . Returns nullptr if mapping is identity .
const vector_size_t* nullIndices() {
    if (hasExtraNulls_) {
      return nullptr;
    }
    return indices_;
  }
const vector_size_t * nullIndices ( ) { if ( hasExtraNulls_ ) { return nullptr ; } return indices_ ; }
Returns the mapping from top-level rows to entries in nulls() buffer.
Returns the mapping from top - level rows to entries in nulls () buffer .