{
  "values": [
    "whisperleaftrees:willow_log",
    "whisperleaftrees:willow_wood",
    "whisperleaftrees:stripped_willow_log",
    "whisperleaftrees:stripped_willow_wood",
    "whisperleaftrees:poplar_log",
    "whisperleaftrees:poplar_wood",
    "whisperleaftrees:stripped_poplar_log",
    "whisperleaftrees:stripped_poplar_wood",
    "whisperleaftrees:alder_log",
    "whisperleaftrees:alder_wood",
    "whisperleaftrees:stripped_alder_log",
    "whisperleaftrees:stripped_alder_wood",
    "whisperleaftrees:aspen_log",
    "whisperleaftrees:aspen_wood",
    "whisperleaftrees:stripped_aspen_log",
    "whisperleaftrees:stripped_aspen_wood"
  ]
}

For leaves:
"whisperleaftrees:[tree type]_leaves"