Use current spend as the basis for comparison against the threshold.
ForecastedSpend
Use forecasted spend for the period as the basis for comparison against
the threshold.
FORECASTED_SPEND can only be set when the budget's time period is a
[Filter.calendar_period][google.cloud.billing.budgets.v1beta1.Filter.calendar_period].
It cannot be set in combination with
[Filter.custom_period][google.cloud.billing.budgets.v1beta1.Filter.custom_period].
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-04-01 UTC."],[[["The `ThresholdRule.Types.Basis` enum defines the method used to determine if spending has exceeded a threshold within the Cloud Billing Budget v1beta1 API."],["The latest version of this API is 2.0.0-beta06, with prior versions including 2.0.0-beta05 and 1.0.0-beta05, each having the same enum."],["The available basis options are `CurrentSpend`, which compares against current spending, `ForecastedSpend`, which compares against projected spending (only for calendar period budgets), and `Unspecified` for an undefined basis."],["`ForecastedSpend` can not be used with `custom_period`, it must be used with `calendar_period`."]]],[]]
