aggregation

Description

A nested list of aggregation operators in graph neural network aggregation process.

aggregation: [[sum, mean, max, var]]
aggregation: [[sum, mean, max, min, std], [sum, max]]

run_mode	Default Value
FAST	`[[sum, mean, max], [sum, mean, min, max, std]]`
NORMAL	`[[sum, mean, max], [sum, mean, min, max, std]]`
BEST	`[[sum, mean, max], [sum, mean, min, max, std]]`