code: def xrefs_from(self):
          
          for line in self.lines:
              for xref in line.xrefs_from:
                  if xref.type.is_flow:
                      continue
  
                  if xref.to in self and xref.iscode:
                      continue
  
                  yield xref
docs: Xrefs from the function.
  
          This includes the xrefs from every line in the function, as `Xref` objects.
          Xrefs are filtered to exclude code references that are internal to the function. This
          means that every xrefs to the function's code will NOT be returned (yet, references
          to the function's data will be returnd). To get those extra xrefs, you need to iterate
          the function's lines yourself.