function readDefinitionLevelsV2(reader, daph2, schemaPath) {
  const maxDefinitionLevel = getMaxDefinitionLevel(schemaPath)
  if (maxDefinitionLevel) {
    // V2 we know the length
    const values = new Array(daph2.num_values)
    readRleBitPackedHybrid(reader, bitWidth(maxDefinitionLevel), daph2.definition_levels_byte_length, values)
    return values
  }
}
@param {DataReader} reader
@param {DataPageHeaderV2} daph2 data page header v2
@param {SchemaTree[]} schemaPath
@returns {number[] | undefined} definition levels