public Set<OperationShape> getInputBindings(ToShapeId input) {
        return SetUtils.copyOf(boundInputOperations.getOrDefault(input.toShapeId(), Collections.emptySet()));
    }
Gets all the operations that bind the given shape as input.

@param input The structure that may be used as input.
@return Returns a set of operations that bind the given input shape.
smithy-model/src/main/java/software/amazon/smithy/model/knowledge/OperationIndex.java