code: def tex_pdf_emitter(target, source, env):
      
      (target, source) = tex_emitter_core(target, source, env, LatexGraphics)
  
      return (target, source)
docs: An emitter for TeX and LaTeX sources when
      executing pdftex or pdflatex. It will accept graphics
      files of types .pdf, .jpg, .png, .gif, and .tif