/// \p ModuleToDefinedGVSummaries contains for each Module a map
/// (GUID -> Summary) for every global defined in the module.
///
+/// \p isPrevailing is a callback that will be called with a global value's GUID
+/// and summary and should return whether the module corresponding to the
+/// summary contains the linker-prevailing copy of that value.
+///
/// \p ImportLists will be populated with an entry for every Module we are
/// importing into. This entry is itself a map that can be passed to
/// FunctionImporter::importFunctions() above (see description there).
/// Compute all the imports for the given module using the Index.
///
+/// \p isPrevailing is a callback that will be called with a global value's GUID
+/// and summary and should return whether the module corresponding to the
+/// summary contains the linker-prevailing copy of that value.
+///
/// \p ImportList will be populated with a map that can be passed to
/// FunctionImporter::importFunctions() above (see description there).
void ComputeCrossModuleImportForModule(