public MethodCallExpression getSpecificationContext() {
    return createDirectMethodCall(VariableExpression.THIS_EXPRESSION,
        nodeCache.SpecInternals_GetSpecificationContext, ArgumentListExpression.EMPTY_ARGUMENTS);
  }
A Spec visitor responsible for most of the rewriting of a Spec's AST.

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