from
Designate the outgoing vertex for an addE() step.
Synopsis
from('vertex\_designator')
Description
The from() step is a step modulator, a helper step for another traversal step.
Its main use is to designate the outgoing vertex for an addE() step.
Generally, a to() step is paired with a from() step.
Examples
g.V().has('person', 'name', 'Jim Walsh').as('jim').
V().has('person', 'name', 'Sharon Smith').as('sharon').
addE('knows').from('jim').to('sharon').property('since', 1980)
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