collect
Creates a list of all non-null grouped values, preserving duplicates.
collect(xs:list) -> listDescription
The collect function returns a list of all non-null values in xs, including
duplicates.
xs: list
The values to collect.
Examples
Collect values into a list
from {x: 1}, {x: 2}, {x: 2}, {x: 3}
summarize values=collect(x)
{values: [1, 2, 2, 3]}