Source:
static Result applyTransformations(Picasso picasso, Request data, List<Transformation> transformations, Result result) { for (int i = 0, count = transformations.size(); i < count; i++) { final Transformation transformation = transformations.get(i); Result newResult; try { newResult = transformation.transform(result); if (picasso.loggingEnabled) { log(OWNER_HUNTER, VERB_TRANSFORMED, data.logId(), "from transformations"); } } catch (final RuntimeException e) { Picasso.HANDLER.post(new Runnable() { @Override public void run() { throw new RuntimeException( "Transformation " + transformation.key() + " crashed with exception.", e); } }); return null; } if (newResult == null) { final StringBuilder builder = new StringBuilder() .append("Transformation ") .append(transformation.key()) .append(" returned null after ") .append(i) .append(" previous transformation(s).\n\nTransformation list:\n"); for (Transformation t : transformations) { builder.append(t.key()).append('\n'); } Picasso.HANDLER.post(new Runnable() { @Override public void run() { throw new NullPointerException(builder.toString()); } }); return null; } Bitmap bitmap = result.getBitmap(); if (newResult == result && bitmap.isRecycled()) { Picasso.HANDLER.post(new Runnable() { @Override public void run() { throw new IllegalStateException("Transformation " + transformation.key() + " returned input Bitmap but recycled it."); } }); return null; } if (newResult != result && newResult.getBitmap() != result.getBitmap() && !bitmap.isRecycled()) { Picasso.HANDLER.post(new Runnable() { @Override public void run() { throw new IllegalStateException("Transformation " + transformation.key() + " mutated input Bitmap but failed to recycle the original."); } }); return null; } result = newResult; } return result; }

Target:
static Result applyTransformations(Picasso picasso, Request data, List<Transformation> transformations, Result result) { for (int i = 0, count = transformations.size(); i < count; i++) { final Transformation transformation = transformations.get(i); Result newResult; try { newResult = transformation.transform(result); if (picasso.loggingEnabled) { log(OWNER_HUNTER, VERB_TRANSFORMED, data.logId(), "from transformations"); } } catch (final RuntimeException e) { Picasso.HANDLER.post(new Runnable() { @Override public void run() { throw new RuntimeException( "Transformation " + transformation.key() + " crashed with exception.", e); } }); return null; } if (newResult == null) { final StringBuilder builder = new StringBuilder() .append("Transformation ") .append(transformation.key()) .append(" returned null after ") .append(i) .append(" previous transformation(s).\n\nTransformation list:\n"); for (Transformation t : transformations) { builder.append(t.key()).append('\n'); } Picasso.HANDLER.post(new Runnable() { @Override public void run() { throw new NullPointerException(builder.toString()); } }); return null; } Bitmap bitmap = result.getBitmap(); if (newResult == result && bitmap.isRecycled()) { Picasso.HANDLER.post(new Runnable() { @Override public void run() { throw new IllegalStateException("Transformation " + transformation.key() + " returned input Bitmap but recycled it."); } }); return null; } if (newResult != result && newResult.getBitmap() != bitmap && !bitmap.isRecycled()) { Picasso.HANDLER.post(new Runnable() { @Override public void run() { throw new IllegalStateException("Transformation " + transformation.key() + " mutated input Bitmap but failed to recycle the original."); } }); return null; } result = newResult; } return result; }