Add ST_SPL draft
Use a SimpleResultSet
Add Weighted Directed One-to-One + unit test
Change signature for backwards compatibility
Cover Unweighted Directed One-to-One + unit test
Do some function parsing work
Add orientation parsing tests
Add weight parsing tests
Add GraphCreator tests for D / WD
Simplify tests
Check edge IDs as well
Add test for R
Add test for WR
Fix instanceofs
Add test for U and WU
Check vertex and edge set sizes
Add tests for DO and WDO
Add tests for RO and WRO
Fix instanceofs
Throw error if invalid edge orientation