Set<String> ( PsiStatement statement) { final Set<String> out = new HashSet<>(); if (statement instanceof PsiDeclarationStatement) { addDeclarations((PsiDeclarationStatement)statement, out); } else if (statement instanceof PsiBlockStatement blockStatement) { final PsiCodeBlock block = blockStatement.getCodeBlock(); final PsiStatement[] statements = block.getStatements(); for (PsiStatement statement1 : statements) { if (statement1 instanceof PsiDeclarationStatement) { addDeclarations((PsiDeclarationStatement)statement1, out); } } } return out; }