Function called for each @meta in @buffer as a result of performing a
transformation on @transbuf. Additional @type specific transform data
is passed to the function as @data.
Implementations should check the @type of the transform and parse
additional type specific fields in @data that should be used to update
the metadata on @transbuf.
Function called for each @meta in @buffer as a result of performing a transformation on @transbuf. Additional @type specific transform data is passed to the function as @data.
Implementations should check the @type of the transform and parse additional type specific fields in @data that should be used to update the metadata on @transbuf.