public String getShaderParamDefine(String paramName) {
        Integer defineId = paramToDefineId.get(paramName);
        if (defineId != null) {
            return defineNames.get(defineId);
        } else {
            return null;
        }
    }
Returns the define name which the given material parameter influences.

@param paramName The parameter name to look up
@return The define name

@see #addShaderParamDefine(java.lang.String, com.jme3.shader.VarType, java.lang.String)
jme3-core/src/main/java/com/jme3/material/TechniqueDef.java