@Override
  @SuppressWarnings("unchecked")
  public void visitBlockStatement(BlockStatement stat) {
    replaceAll(stat.getStatements());
  }
Groovy AST visitor that allows to replace both statements and expressions.

@author Peter Niederwieser
spock-core/src/main/java/org/spockframework/compiler/ExpressionReplacingVisitorSupport.java