@Override
              public Object answer(InvocationOnMock invocation) throws Throwable {
                return gdhProvider.get();
              }
Creates a mock GenericDraweeHierarchyBuilder with stubbed build.

@param drawableHierarchies drawable hierarchies to return on {@code build()}
@return mock GenericDraweeHierarchyBuilder
drawee/src/test/java/com/facebook/drawee/testing/DraweeMocks.java