@git_tree_state.setter<EOL><INDENT>def git_tree_state(self, git_tree_state):<DEDENT>
if git_tree_state is None:<EOL><INDENT>raise ValueError("<STR_LIT>")<EOL><DEDENT>self._git_tree_state = git_tree_state<EOL>
Sets the git_tree_state of this VersionInfo.

:param git_tree_state: The git_tree_state of this VersionInfo.
:type: str