Imports github.com/pkg/errors github.com/hhrutter/pdflib/types github.com/hhrutter/pdflib/read github.com/hhrutter/pdflib/extract github.com/hhrutter/pdflib/optimize github.com/hhrutter/pdflib/write github.com/hhrutter/pdflib/merge github.com/hhrutter/pdflib/validate Standard library imports fmt io io/ioutil log os path/filepath regexp strconv strings time