Can a search warrant affidavit be sealed to protect the identity of a confidential informant?

All or any part of a search warrant affidavit may be sealed if necessary to protect the identity of a confidential informant. (Evid. Code, 1041; Hobbs, supra, 7 Cal.4th at p. 971.) "When a defendant seeks to quash or traverse a warrant where a portion of the supporting affidavit has been sealed, the relevant materials are to be made available for in camera review by the trial court." (People v. Galland (2008) 45 Cal.4th 354, 364.) "The court should determine first whether there are sufficient grounds for maintaining the confidentiality of the informant's identity. If so, the court should then determine whether the sealing of the affidavit (or any portion thereof) 'is necessary to avoid revealing the informant's identity.' [Citation.] Once the affidavit is found to have been properly sealed, the court should proceed to determine 'whether, under the "totality of the circumstances" presented in the search warrant affidavit and the oral testimony, if any, presented to the magistrate, there was "a fair probability" that contraband or evidence of a crime would be found in the place searched pursuant to the warrant' (if the defendant has moved to quash the warrant) or 'whether the defendant's general allegations of material misrepresentations or omissions are supported by the public and sealed portions of the search warrant affidavit, including any testimony offered at the in camera hearing' (if the defendant has moved to traverse the warrant). [Citation.]" (Ibid.; Hobbs, at pp. 972-975.)