iter_lookup

Description:

public abstract bool iter_lookup (MetadataIter iter, string key)

Look up the specified key and initialise an iterator to reference the associated metadata.

The iterator is used in conjunction with gegl_metadata_set_value and gegl_metadata_get_value. Note that this iterator is not valid for iter_next.

Parameters:

this

The Metadata interface
iter

MetadataIter to be initialised
key

Name of the value look up

Returns:

true if key is found.