0107: Expected function return type
Compiler expected a valid identifier to follow a colon (:) in the function signature but found something else.
E.g. consider this example:
The function definition ends with a colon implying a return type, but there is none defined. Or:
Compiler found an integer literal, where a name of the type was expected.
Possible solutions:
add one of the known types after the colon:
if function returns nothing, delete
:after arguments list
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