Attachment: 8-K


he-20220617.xsd
Attachment: XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT


he-20220617_def.xml
Attachment: XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT


he-20220617_lab.xml
Attachment: XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT


he-20220617_pre.xml
Attachment: XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT