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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def xrefs_from(self):
 """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. """

        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