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Returns a join that pairs elements from the primary collection with matching elements from the secondary collection. Each result has a 'primary' property that contains the element from the primary collection, and a 'secondary' property containing the matching element from the secondary collection. If measureKey is specified, the join measure is also attached to the object as a property.

ee.Join.inner(primaryKey, secondaryKey, measureKey)Join
primaryKeyString, default: "primary"The property name used to save the primary match.
secondaryKeyString, default: "secondary"The property name used to save the secondary match.
measureKeyString, default: nullAn optional property name used to save the measure of the join condition.