def part_related_by(self, reltype):
        return self.rels.part_with_reltype(reltype)
Construct a ProjectTree for the given build_root path.
dataset/ETHPy150Open scanny/python-pptx/pptx/opc/package.py/Part.part_related_by--crossover with--dataset/ETHPy150Open pantsbuild/pants/tests/python/pants_test/base/project_tree_test_base.py/ProjectTreeTestBase.mk_project_tree