What is the burden on the appellant to provide an adequate record to permit review of a claimed error?

"It is axiomatic that it is the burden of the appellant to provide an adequate record to permit review of a claimed error, and failure to do so may be deemed a waiver of the issue on appeal. [Citations.]" (People v. Akins (2005) 128 Cal.App.4th 1376, 1385.) "[I]t is settled that: 'A judgment or order of the lower court is presumed correct. All intendments and presumptions are indulged to support it on matters as to which the record is silent, and error must be affirmatively shown. This is not only a general principle of appellate practice but an ingredient of the constitutional doctrine of reversible error.' [Citations.]" (Denham v. Superior Court (1970) 2 Cal.3d 557, 564.)