reference images into a Word document.
This function is to be used with wml_link_images.
Images need to be referenced into the Word document, this will generate unique identifiers that need to be known to link these images with their corresponding xml code (wml).
docx_reference_img(x, src)an rdocx object
a vector of character containing image filenames.
Other functions for officer extensions:
fortify_location(),
get_reference_value(),
opts_current_table(),
to_html(),
to_pml(),
to_wml(),
wml_link_images()