java代码设置below的问题有懂的吗？

DependentLayout allLayout = new DependentLayout(this);
allLayout.setWidth(ComponentContainer.LayoutConfig.MATCH_PARENT);
allLayout.setHeight(ComponentContainer.LayoutConfig.MATCH_PARENT);

DirectionalLayout topLayout = new DirectionalLayout(getContext());
topLayout.setWidth(ComponentContainer.LayoutConfig.MATCH_PARENT);
topLayout.setHeight(ComponentContainer.LayoutConfig.MATCH_CONTENT);
        
DependentLayout mapLayout = new DependentLayout(this);
mapLayout.setWidth(ComponentContainer.LayoutConfig.MATCH_PARENT);
mapLayout.setHeight(ComponentContainer.LayoutConfig.MATCH_PARENT);
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