default @NotNull CompoundBinaryTag getCompound(final @NotNull String key) {
    return this.getCompound(key, empty());
  }
Gets a compound.

@param key the key
@return the compound, or a new compound if this compound does not contain a compound tag
    with the specified key, or has a tag with a different type
@since 4.0.0
nbt/src/main/java/net/kyori/adventure/nbt/CompoundBinaryTag.java