Array and Map paramter ignored as source-parameter if used as only source

I found while investigation #168, that currently the plugin ignores source parameters of type array and Map, if used as the only source parameter.
Here a small example Mapper:

import org.mapstruct.Mapper;

import java.util.Map;

@Mapper
public interface MultiSourceMapper {

    class ArrayTarget {
        private int[] myArray;

        public int[] getMyArray() {
            return myArray;
        }

        public void setMyArray(int[] myArray) {
            this.myArray = myArray;
        }
    }

    ArrayTarget mapToArrayTarget(int[] myArray);

    class MapTarget {
        private Map<Integer, Integer> myMap;

        public Map<Integer, Integer> getMyMap() {
            return myMap;
        }

        public void setMyMap(Map<Integer, Integer> myMap) {
            this.myMap = myMap;
        }
    }

    MapTarget mapToMapTarget(Map<Integer, Integer> myMap);
}

This generates code where all targets are mapped based on their names. The plugin currently ignores the source parameters and give a unmapped target property warning.

Also the completion doesn't show them as source parameters.

One thing to notice:
For Iterable this behavior is correct as mapstruct itself doesn't support mapping from Iterable to Object.

Reproduce the issue with the Java MultiSourceMapper example from the report, checking both array and Map source parameters and comparing the stated Iterable behavior. Trace the plugin's source-parameter handling and completion behavior; the fix is done when array and Map parameters are recognized as the only source, mapped target warnings no longer appear, and completion lists them.