def get_source_import(self):
import_header = {"<STR_LIT>": Consts.mediaTypeImportPreview}<EOL>headers, data = self._requester.requestJsonAndCheck(<EOL>"<STR_LIT:GET>",<EOL>self.url + "<STR_LIT>",<EOL>headers=import_header,<EOL>)<EOL>if not data:<EOL><INDENT>return None<EOL><DEDENT>else:<EOL><INDENT>return github.SourceImport.SourceImport(self._requester, headers, data, completed=True)<EOL><DEDENT>
:calls: `GET /repos/:owner/:repo/import <https://developer.github.com/v3/migration/source_imports/#get-import-progress>`_
:rtype: :class:`github.SourceImport.SourceImport`