AbstractAbstractpatchChanges a drawing whose alt text holds the placeholder, and the parts it refers to. patchDocument calls it for
each such drawing before it patches text, so it only sees the template's own drawings.
A relationship the drawing referred to that nothing in its part refers to once it is patched, such as to a picture's old image, is then removed, and so is the part it referred to, unless something else refers to it.
A patch for a drawing in a template whose alt text holds the placeholder, such as
{{sales}}, rather than for the placeholder in text. It changes the drawing, and the parts it refers to, in place. ImagePatch is one: it replaces a picture's image. So isChartDataPatchfromdocx/charts, which replaces the data of a chart made in Word.A drawing's alt text is its description (
descr) or title. A drawing patch leaves the placeholder in text as it is.Public Api