globalScope> Global PDOperatorCreateFromDefinition (const void **defs): CLANG doesn't like homemade retaining
globalScope> Global PDPipeExecute (PDPipeRef pipe): : CLANG: does not recognize that dynamicFiltering is always true if sht is nil.
globalScope> Global PDStaticHashCreate (PDInteger entries, void **keys, void **values): had 1 assert below; so this needs to be ripped out asap
globalScope> Global PDStringFromComplex (pd_stack *complex): Change name to reflect that returned value is allocated and must be freed.