Update CelUnparser and open up visibility so that inheriting class can use it

PiperOrigin-RevId: 721648879

Author: CEL Dev Team

parser/BUILD.bazel

@@ -24,6 +24,11 @@ java_library(
     exports = ["//parser/src/main/java/dev/cel/parser:parser_builder"],
 )
 
+java_library(
+    name = "unparser_visitor",
+    exports = ["//parser/src/main/java/dev/cel/parser:unparser_visitor"],
+)
+
 java_library(
     name = "macro",
     exports = ["//parser/src/main/java/dev/cel/parser:macro"],

parser/src/main/java/dev/cel/parser/BUILD.bazel

@@ -94,14 +94,12 @@ java_library(
     deps = [
         ":operator",
         "//:auto_value",
-        "//common",
         "//common:compiler_common",
         "//common:source_location",
         "//common/ast",
         "//common/ast:expr_factory",
         "@maven//:com_google_errorprone_error_prone_annotations",
         "@maven//:com_google_guava_guava",
-        "@maven//:org_jspecify_jspecify",
     ],
 )
 

parser/src/main/java/dev/cel/parser/CelUnparserVisitor.java

@@ -319,7 +319,7 @@ private void visitIndex(CelCall expr, String op) {
     stringBuilder.append(RIGHT_BRACKET);
   }
 
-  private void visitMaybeNested(CelExpr expr, boolean nested) {
+  protected void visitMaybeNested(CelExpr expr, boolean nested) {
     if (nested) {
       stringBuilder.append(LEFT_PAREN);
     }
@@ -329,7 +329,7 @@ private void visitMaybeNested(CelExpr expr, boolean nested) {
     }
   }
 
-  private boolean isBinaryOrTernaryOperator(CelExpr expr) {
+  protected boolean isBinaryOrTernaryOperator(CelExpr expr) {
     if (!isComplexOperator(expr)) {
       return false;
     }