public JavaContainerBuilder setModificationTimeProvider(
      ModificationTimeProvider modificationTimeProvider) {
    this.modificationTimeProvider = modificationTimeProvider;
    return this;
  }
Sets the modification time provider for container files.

@param modificationTimeProvider a provider that takes a source path and destination path on the
    container and returns the file modification time that should be set for that path
@return this
jib-core/src/main/java/com/google/cloud/tools/jib/api/JavaContainerBuilder.java