ECHO: "Children empty: begin"
ECHO: "child1"
ECHO: "child2"
ECHO: "child3"
ECHO: "child4"
ECHO: "child5"
ECHO: "Children empty: end"
ECHO: "Children scalar: begin"
ECHO: "child1"
ECHO: "child5"
ECHO: "child3"
WARNING: Children index (5) out of bounds (5 children) in file children-tests.scad, line 32
WARNING: Children index (-1) out of bounds (5 children) in file children-tests.scad, line 33
ECHO: "Children scalar: end"
ECHO: "Children vector: begin"
ECHO: "child5"
ECHO: "child1"
ECHO: "child4"
ECHO: "child2"
WARNING: Children index (5) out of bounds (5 children) in file children-tests.scad, line 44
WARNING: Children index (-1) out of bounds (5 children) in file children-tests.scad, line 44
ECHO: "Children vector: end"
ECHO: "Children range: begin"
ECHO: "child1"
ECHO: "child2"
ECHO: "child3"
ECHO: "child4"
ECHO: "child5"
ECHO: "child2"
ECHO: "child3"
ECHO: "child1"
ECHO: "child3"
ECHO: "child5"
WARNING: begin is smaller than the end, but step is negative in file children-tests.scad, line 56
ECHO: "Children range: end"
