Macthes some paths but why ?

[Sim4n6]

Please, I don't get well this query:

from CallNode call
where call.getAChild*().(AttrNode).getName().matches("%path")
select call, "call" 

It seems that it searches for all call expressions, like fct(..) or foo.bar(..).
Then, it casts to Attribute Node from their it gets a name and checks for %path.
I am kind of lost here. What is the role of getAChild*() with a star * please?
and the getName corresponds to what? and attribute name maybe? why the value path and the regex %, please?

[hvitved]

x.getAChild() will give you you an immediate AST child of x. x.getAChild*() gives you the reflexive, transitive children of x (that is, including x itself). (AttrNode).getName().matches("%path") will match any attribute expression foo.bar where bar ends with path. So, in summary, you will get all calls where somewhere inside one of the arguments (or the receiver) there is an attribute expression that accesses an attribute whose name ends with path, e.g.

call(x.foo) # no match
call(x.path) # match
call(x.foo.path) # match
call(x.mypath) # match