RecruitingPhase 2Combination productA Phase II Study to Investigate Lung Function With 2 Different Doses of Inhaled Glycopyrronium Taken With BFF Compared to BFF in Participants of 4 to Less Than 12 Years of Age With AsthmaThe purpose of this study is to evaluate the effect of 2 different GP metered dose inhaler (MDI) doses relative to placebo MDI as add-on treatment to BFF MDI on lung function in participants 4 to less than 12 years of age with asthma.