code: public static StreamGraph generate(StreamExecutionEnvironment env, List<StreamTransformation<?>> transformations) {
  		return new StreamGraphGenerator(env).generateInternal(transformations);
  	}
docs: Generates a {@code StreamGraph} by traversing the graph of {@code StreamTransformations}
  starting from the given transformations.
  
  @param env The {@code StreamExecutionEnvironment} that is used to set some parameters of the
  job
  @param transformations The transformations starting from which to transform the graph
  
  @return The generated {@code StreamGraph}