Genex: Provide user defined default constructor
Merge topic 'pdb-genex' into next

2e355be3 Genex: Provide user defined default constructor
Genex: Simplify filesytem artifact code
Genex: Implement generator expressions for target PDB files.
Merge topic 'pdb-genex' into next

b43933af Genex: Implement generator expressions for target PDB files.
dc131438 Genex: Simplify filesytem artifact code