make mask and projection classes more similar

enabled an automatic merge when the pipeline for 6e8aeca6 succeeds

aborted the automatic merge because source branch was updated

added 1 commit

• 71490833 - clang-format

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added 3 commits

• cc76c45b - sort forward decls
• 97c71a5e - rm member
• f6635218 - inline fct

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added 1 commit

• 778cf5c7 - clang-format

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enabled an automatic merge when the pipeline for 778cf5c7 succeeds

mentioned in commit 93788a84

merged