Modifying tree-shaking module by module

Index.js

              if (moduleSource?.indexOf('externalize') > -1 || false) {
                module.buildMeta = mergeDeep(module.buildMeta, { isExternalized: true });

                // add exports back to usedExports, prevents tree shaking on module
                Object.assign(module, { usedExports: module?.buildMeta?.providedExports || true });

                try {
                  // look at refactoring this to use buildMeta not mutate id
                  module.id = moduleSource.match(/\/\*\s*externalize\s*:\s*(\S+)\s*\*\//)[1];
                  externalModules[module.id] = {};
                } catch (error) {
                  throw new Error('external-import', error.message);
                }
              }