add interface
add node interface
Remove old code
add hasChildResults/getChildResults methods
add merge method
add hasChildResults/getChildResults methods
use CoverageResult
remove spec
add trait spec
Remove spec
Remove spec
Merge remote-tracking branch 'origin/1.4.0-node' into 1.4.0-node
add Visitor
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add filter
add phpmetrics
add trait methods
add factory method
add fixtures
add spec