Add factory-method

[alexengrig]

Close #9

[codecov-commenter]

Codecov Report

Merging #14 (dc7da64) into master (990d29b) will decrease coverage by 42.34%.
The diff coverage is 18.53%.

@@              Coverage Diff              @@
##             master      #14       +/-   ##
=============================================
- Coverage     99.22%   56.88%   -42.35%     
+ Complexity      174      138       -36     
=============================================
  Files            19       23        +4     
  Lines           386      545      +159     
  Branches         28       54       +26     
=============================================
- Hits            383      310       -73     
- Misses            0      231      +231     
- Partials          3        4        +1     

Impacted Files	Coverage Δ
...grig/metter/element/descriptor/TypeDescriptor.java	76.92% <0.00%> (-23.08%)	⬇️
...dev/alexengrig/metter/processor/BaseProcessor.java	87.50% <0.00%> (-4.61%)	⬇️
...tter/processor/GetterSupplierFactoryProcessor.java	0.00% <0.00%> (ø)
...ig/metter/processor/OnMethodSupplierProcessor.java	0.00% <0.00%> (ø)
...tter/processor/SetterSupplierFactoryProcessor.java	0.00% <0.00%> (ø)
...rig/metter/processor/OnClassSupplierProcessor.java	7.69% <7.69%> (ø)
...ig/metter/element/descriptor/MethodDescriptor.java	72.22% <50.00%> (-27.78%)	⬇️
.../metter/processor/BaseMethodSupplierProcessor.java	40.98% <53.65%> (-59.02%)	⬇️
...grig/metter/processor/GetterSupplierProcessor.java	56.66% <87.50%> (-43.34%)	⬇️
...grig/metter/processor/SetterSupplierProcessor.java	56.66% <87.50%> (-43.34%)	⬇️
... and 8 more

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