def _set_last_established_time(self, v, load=False):
if hasattr(v, "<STR_LIT>"):<EOL><INDENT>v = v._utype(v)<EOL><DEDENT>try:<EOL><INDENT>t = YANGDynClass(<EOL>v,<EOL>base=RestrictedClassType(<EOL>base_type=long,<EOL>restriction_dict={"<STR_LIT>": ["<STR_LIT>"]},<EOL>int_size=<NUM_LIT:64>,<EOL>),<EOL>is_leaf=True,<EOL>yang_name="<STR_LIT>",<EOL>parent=self,<EOL>path_helper=self._path_helper,<EOL>extmethods=self._extmethods,<EOL>register_paths=True,<EOL>namespace="<STR_LIT>",<EOL>defining_module="<STR_LIT>",<EOL>yang_type="<STR_LIT>",<EOL>is_config=False,<EOL>)<EOL><DEDENT>except (TypeError, ValueError):<EOL><INDENT>raise ValueError(<EOL>{<EOL>"<STR_LIT>": """<STR_LIT>""",<EOL>"<STR_LIT>": "<STR_LIT>",<EOL>"<STR_LIT>": """<STR_LIT>""",<EOL>}<EOL>)<EOL><DEDENT>self.__last_established_time = t<EOL>if hasattr(self, "<STR_LIT>"):<EOL><INDENT>self._set()<EOL><DEDENT>
Setter method for last_established_time, mapped from YANG variable /network_instances/network_instance/protocols/protocol/ospfv2/areas/area/interfaces/interface/neighbors/neighbor/state/last_established_time (oc-types:timeticks64)
    If this variable is read-only (config: false) in the
    source YANG file, then _set_last_established_time is considered as a private
    method. Backends looking to populate this variable should
    do so via calling thisObj._set_last_established_time() directly.

    YANG Description: The time at which the adjacency was last established with
the neighbor. That is to say the time at which the
adjacency last transitioned into the FULL state.

This value is expressed as the number of seconds, relative to
the Unix Epoch (Jan 1, 1970 00:00:00 UTC).