heft-plugins/heft-webpack4-plugin/src/WebpackPlugin.ts
heft-plugins/heft-webpack5-plugin/src/WebpackPlugin.ts

heft-plugins/heft-webpack4-plugin/src/WebpackConfigurationLoader.ts
heft-plugins/heft-webpack5-plugin/src/WebpackConfigurationLoader.ts

heft-plugins/heft-webpack4-plugin/src/shared.ts
heft-plugins/heft-webpack5-plugin/src/shared.ts

heft-plugins/heft-webpack4-plugin/src/index.ts
heft-plugins/heft-webpack5-plugin/src/index.ts