Values.PipelineVariableDeclarationSourceA variable declared at the pipeline level.
type nonrec t = {name : PipelineVariableName.t;The name of a pipeline-level variable.
*)defaultValue : PipelineVariableValue.t option;The value of a pipeline-level variable.
*)description : PipelineVariableDescription.t option;The description of a pipeline-level variable. It's used to add additional context about the variable, and not being used at time when pipeline executes.
*)}